Streaming devices / Compare

Roku Ultra (2024) vs Xiaomi TV Box S (2nd Gen)

A

Product A: Roku

Ultra (2024)

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B

Product B: Xiaomi

TV Box S (2nd Gen)

60 of 97 known

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Only differences

ARoku Ultra (2024)

BXiaomi TV Box S (2nd Gen)

General

4 of 8 differ

Series

Ultra2Press releaseroku.com/blog/new-roku-ultraRead 7 October 2026Exact 2024 Roku Ultra launch, describing successive Ultra devices.

Not available

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

4850R, 4850X1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Exact retail product details list Model 4850R. Developer model identifier 4850X is separately sourced. Not older 4800/4802 or Walmart LT.3Maker product pagedeveloper.roku.com/dev/docs/hardwareRead 7 October 2026Current hardware table names Ultra Brewster 4850X, 2024. Software hardware identifier alongside retail SKU 4850R.

MDZ-28-AA, PFJ4151EU7Retailer pagepood.datafox.ee/audio-ja-video/tv-tarvikud/xiaomi-tv-box-s-2nd-gen-multimedia-playerRead 15 October 2026Estonian retailer lists the EU product code PFJ4151EU. eBay listings pair the same EAN with MPN MDZ-28-AA.

GTIN / EAN

8296100068889Retailer pageabt.com/Roku-Ultra-4K-Streaming-Device-2024-4850R/p/213248.htmlRead 7 October 2026Exact 4850R product header UPC 829610006888.

69714081570447Retailer pagepood.datafox.ee/audio-ja-video/tv-tarvikud/xiaomi-tv-box-s-2nd-gen-multimedia-playerRead 15 October 2026EAN 6971408157044 for PFJ4151EU, black, 2 GB and 8 GB.

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

24 September 20242Press releaseroku.com/blog/new-roku-ultraRead 7 October 2026Dated September 24, 2024.

19 April 20233Press articlemezha.ua/en/2023/04/19/xiaomi-introduced-the-tv-box-s-media-player-of-the-second-generationRead 15 October 2026Press report dated 19 April 2023 that Xiaomi introduced the box. The maker published no dated launch post that was found.

Status

Available3Maker product pagedeveloper.roku.com/dev/docs/hardwareRead 7 October 2026Current models table explicitly manufactured and supported. Current product is for sale, so available.

Available5Reviewsmartzone.de/testbericht-xiaomi-tv-box-s-2-genRead 15 October 2026Test of 25 July 2023 with a price list updated 13 September 2026 that still shows shops selling the box.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Xiaomi TV Box S (3rd Gen)12Reviewnotebookcheck.net/New-Xiaomi-TV-Box-S-3rd-Gen-with-more-powerful-processor-revealed.986381.0.htmlRead 23 October 2026Notebookcheck says the Xiaomi TV Box S (3rd Gen) follows the TV Box S (2nd Gen) and calls the 2nd Gen its predecessor.

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$99.992Press releaseroku.com/blog/new-roku-ultraRead 7 October 2026Availability explicitly $99.99 in US. US pre-tax MSRP, separate from Canadian price or later sales.

Not available

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

Not available

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

US2Press releaseroku.com/blog/new-roku-ultraRead 7 October 2026Launch US availability and current US 4850R reference. Canadian retail identifier not proved, so no CA variant inherited.

DE, ES, EE, LV, PL7Retailer pagepood.datafox.ee/audio-ja-video/tv-tarvikud/xiaomi-tv-box-s-2nd-gen-multimedia-playerRead 15 October 2026Sold in Estonia with the EU code. The maker has a German spec tab, Xataka reports Spanish sales, LMT lists it in Latvia and x-kom in Poland.8Press articlexatakahome.com/centro-multimedia/xiaomi-tv-box-s-2nd-gen-caracteristicas-precio-ficha-tecnicaRead 15 October 202616 May 2023 report that the box is on sale in Spain through Amazon.

ColoursiThe maker's own colour names

Black9Retailer pageabt.com/Roku-Ultra-4K-Streaming-Device-2024-4850R/p/213248.htmlRead 7 October 2026Exact 4850R listing names Black Finish. No arbitrary finish variants added.

Black1Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026

Form factoriA stick plugs straight into the HDMI port. A dongle hangs from its own short fixed HDMI lead. A box stands on its own and connects by a separate cable.

Box8Reviewtomsguide.com/tvs/roku-ultra-2024-reviewRead 7 October 2026Exact 2024 review repeatedly identifies small box, separate from sticks.

Box2Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-genRead 15 October 2026Maker sells it as a TV Box with a separate HDMI cable and a separate power adapter.

Video output

6 of 11 differ

Max output resolutioniHighest published video output resolution. Decoder capability and app streaming quality do not establish the output resolution.

3840 × 2160px1Maker product pageroku.com/products/roku-ultraRead 7 October 2026TV compatibility: up to 2160p at 60 fps (3840 x 2160). This is HDMI output, not UI rendering resolution.

3840 × 2160px1Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026Specs tab states Output Resolution 4K (3840 x 2160).

Max output refresh rateiHighest published output refresh rate. Resolution, HDR and connection conditions belong in the source note. This is not a television panel refresh rate.

60Hz1Maker product pageroku.com/products/roku-ultraRead 7 October 2026TV compatibility explicitly up to 2160p at 60 fps and Dolby Vision at 60 fps. Requires compatible HDMI/HDCP chain. No higher UI/TV rate imported.

60Hz7Retailer pagepood.datafox.ee/audio-ja-video/tv-tarvikud/xiaomi-tv-box-s-2nd-gen-multimedia-playerRead 15 October 2026Retailer spec: display output 3840 x 2160 pixels at 60 fps. The maker states the 60 FPS only for the video decoder. Mezha says the HDMI bandwidth limits output to 4K at 60 Hz.

Video output modesiPublished video output combinations. A row records support, not a proved maximum at every lower resolution. Keep HDR, chroma and bit depth conditions in source notes.

ARoku Ultra (2024)

Width (px)	Height (px)	Refresh rate (Hz)	HDR format
3840	2160	60	Dolby Vision

Source1Maker product pageroku.com/products/roku-ultraRead 7 October 2026TV compatibility explicitly supports Dolby Vision at 60 fps on 4K HDR TVs. Native 3840 x 2160 output. Bit depth/chroma unproved.

BXiaomi TV Box S (2nd Gen)

Width (px)	Height (px)	Refresh rate (Hz)
3840	2160	60

Source7Retailer pagepood.datafox.ee/audio-ja-video/tv-tarvikud/xiaomi-tv-box-s-2nd-gen-multimedia-playerRead 15 October 2026Single 4K 60 Hz row from the retailer spec. Bit depth, chroma and HDR pairing are not published.

HDR formats

HDR10, HDR10+, Dolby Vision, HLG1Maker product pageroku.com/products/roku-ultraRead 7 October 2026TV compatibility explicitly lists Dolby Vision, HDR10/10+ and HLG. Compatible content, TV and HDMI chain required.

HDR10, HDR10+, Dolby Vision1Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026Specs tab states Dolby Vision and HDR10+. HDR10 is added from the reviews listed below.3Press articlemezha.ua/en/2023/04/19/xiaomi-introduced-the-tv-box-s-media-player-of-the-second-generationRead 15 October 2026Reports HDR10, HDR10+ and Dolby Vision.4Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review lists Dolby Vision, HDR10+ and HDR10 under color and HDR and in its certification line.

Dolby Vision profilesiPublished supported Dolby Vision profiles and levels. Streaming support does not prove local-file support.

Not available

Not available

HDMI versioniPublished HDMI output revision. A revision does not establish every optional HDMI feature.

2.1b1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Ports table explicitly HDMI 2.1b. Optional features are not inferred from revision.

2.11Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026Socket table lists HDMI 2.1 with a count of 1. Mezha and ProfesionalReview say the real bandwidth matches HDMI 2.0. The maker value is kept and no optional HDMI 2.1 feature is implied.

HDCP version

2.21Maker product pageroku.com/products/roku-ultraRead 7 October 20264K compatibility requires an HDMI input supporting HDCP 2.2. Stored supported 4K-chain version, not a claim of a newer maximum.

Not available

HDMI-CEC

Yes7Owner's manualsupport.roku.com/en-us/article/360057488733Read 7 October 2026Exact 4850 compatibility with HomeKit. Player power control requires TV HDMI-CEC and Roku 1-touch-play. Published CEC function, not every CEC optional feature.

Yes4Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review lists HDMI-CEC available and a setup assistant for TV volume and power keys.5Reviewsmartzone.de/testbericht-xiaomi-tv-box-s-2-genRead 15 October 2026Review: HDMI-CEC is supported for TV basics.

Automatic frame rate matchingiCan switch the video output rate to match content. App, operating system and playback restrictions belong in the source note.

Yes2Press releaseroku.com/blog/new-roku-ultraRead 7 October 2026Exact 2024 launch explicitly HDMI 2.1 Quick Media Switching between refresh rates/content sources. Official auto-adjust article supplies native-content matching settings and app restrictions.12Owner's manualsupport.roku.com/article/change-the-refresh-rateRead 7 October 2026Roku auto-adjust display refresh switches to source native rate on compatible players. Exact 2024 launch additionally establishes QMS switching. Some apps including Netflix/Hulu exclude auto-adjust. Enable in Advanced display settings. QMS requires compatible TV, no implied universal app support.

Not available

Dynamic range matchingiCan switch the output dynamic range to match SDR or HDR content. App and firmware restrictions belong in the source note.

Not available

Not available

UpscalingiNamed video upscaling modes. Record source resolution and output restrictions in source notes.

720p to 1080p, 720p to 2160p, 1080p to 2160p1Maker product pageroku.com/products/roku-ultraRead 7 October 2026TV compatibility separately names upscaling 720p to 1080p and 720p/1080p to 2160p. No named AI processing invented.

Not available

Video decoding

4 of 4 differ

Video codecsiExplicitly supported video decoding formats. Use names such as H.264, HEVC, AV1 and VP9. Chip capabilities alone do not prove device playback support.

H.264, HEVC, VP9.2, AV11Maker product pageroku.com/products/roku-ultraRead 7 October 2026USB media formats explicitly H.264/AVC, H.265/HEVC, VP9.2 and AV1. Local USB route and listed container restrictions, no generic chip capability inherited.

HEVC, VP9, H.264, AV13Press articlemezha.ua/en/2023/04/19/xiaomi-introduced-the-tv-box-s-media-player-of-the-second-generationRead 15 October 2026Reports 4K playback in AV1, VP9 and HEVC.4Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Hardware playback tests list H.264, H.265 and VP9 as OK. AV1 4K at 24 fps 10-bit plays only in streaming apps such as YouTube and the internal player. The review text also claims native 4K60 HDR support for AV1, which the test table does not show.

Video decode limitsiPublished supported decoding limits. Profiles, levels and playback route matter. Output resolution and service support are separate.

ARoku Ultra (2024)

Not available

BXiaomi TV Box S (2nd Gen)

Codec	Profile	Width (px)	Height (px)	Max frame rate (fps)	Bit depth (bits)
HEVC	Main 10	3840	2160	60	10
VP9	Profile 2	3840	2160	60	10

Source4Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review playback tests: H.265 4K 60 fps 10-bit HDR OK, VP9 Profile 2 4K 60 fps 10-bit HDR OK. These are test results that match the maker's up to 4K 60 FPS claim, not a proved ceiling. The 8K VP9 row and the AV1 rows are not stored.

Video containersiExplicitly supported local playback containers. App requirements belong in the source note.

MKV, MP4, MOV1Maker product pageroku.com/products/roku-ultraRead 7 October 2026USB video playback table lists MKV, MP4 and MOV. VP9.2 only MKV, AV1 MP4/MKV, AVC and HEVC all three. This is local playback, not every streaming protocol.

Not available

DRM systemsiNamed supported DRM systems and security levels. DRM certification does not prove a particular service streams at 4K.

Not available

Widevine L1, PlayReady4Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review DRM line: Google Widevine L1 and PlayReady.6Spec databaseandroidtv-guide.comRead 15 October 2026Database lists Widevine L1.

Audio

4 of 8 differ

Audio formatsiPublished supported audio formats. Decoder, output and passthrough roles are qualified in source notes.

AAC, MP3, WMA, FLAC, PCM, AC3, EAC3, DTS Digital Surround, ALAC, HE-AAC, AC-4 with Atmos, EAC3 with Atmos1Maker product pageroku.com/products/roku-ultraRead 7 October 2026USB audio format table lists each stored format. DTS is passthrough, Atmos is via AC-4/EAC3 in listed local containers and HDMI with compatible sound equipment. Decode versus passthrough qualified separately.

Dolby Audio, Dolby Atmos, DTS-HD1Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026Specs tab states Supports Dolby Audio and DTS-HD. Decoding and passthrough roles are not separated by the maker.2Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-genRead 15 October 2026

Audio passthrough formatsiCompressed formats explicitly passed to external audio equipment without decoding. Dolby Atmos support alone does not establish TrueHD passthrough.

DTS Digital Surround, AC3, EAC31Maker product pageroku.com/products/roku-ultraRead 7 October 2026Audio features explicitly DTS Digital Surround pass through over HDMI. AC3/EAC3 passthrough separately sourced from official streaming specification. No TrueHD/DTS-HD inference.4Maker product pagedeveloper.roku.com/dev/docs/mediaRead 7 October 2026Supported audio notes explicitly AC3/EAC3 passthrough to receiving device, separately names Brewster 4850X Dolby support. DTS passthrough also explicit. No lossless-format support inferred.

Not available

Dolby AtmosiExplicit device support for Dolby Atmos. Codec, service, app and output requirements belong in the source note.

Yes1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Audio features explicitly Dolby Atmos decode via HDMI, with compatible speakers. USB audio table names AC-4 and EAC3 Atmos, not TrueHD passthrough.

Yes2Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-genRead 15 October 2026Overview page states Dolby Atmos and DTS-HD and the footnote requires streaming content and devices that support Dolby Atmos decoding. Content, app and HDMI audio path requirements apply.

Audio channel configurationsiPublished output configurations, such as 2.0, 5.1 or 7.1. Keep PCM and compressed audio routes separate in source notes. Dolby Atmos support alone does not establish a channel configuration.

2.01Maker product pageroku.com/products/roku-ultraRead 7 October 2026Audio features explicitly list Digital stereo over HDMI, stored as 2.0. No inferred PCM multichannel output.

2.0, 5.1, 7.14Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review audio settings: HDMI 7.1 and SPDIF 5.1 for Dolby and DTS bitstreams. SPDIF is not compatible with streaming apps. PCM is stereo only with downmix. Those routes give 2.0, 5.1 and 7.1.

Max audio sample rateiHighest published audio output sample rate. Keep playback route and format in source notes.

Not available

Not available

Max audio bit depthiHighest published audio output bit depth. Keep playback route and format in source notes.

Not available

Not available

Bluetooth audio output

Yes1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Bluetooth Headphone Mode explicitly pairs headphones directly to Ultra. Bluetooth input streaming is separate and not used as output proof.

Not available

Bluetooth audio codecsiExplicitly supported codecs for audio sent to Bluetooth headphones or speakers. Bluetooth version alone is not proof.

Not available

Not available

Processor and memory

7 of 11 differ

System on chip

Not available

Amlogic S905X44Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review names Amlogic S905X4 and the device code MiTV-AFKR0 jaws.5Reviewsmartzone.de/testbericht-xiaomi-tv-box-s-2-genRead 15 October 2026Review names Amlogic S905X4.6Spec databaseandroidtv-guide.comRead 15 October 2026Database lists Amlogic S905X4 with code MDZ-28-AA / MiTV-AFKR0 / jaws.

CPU

ARM Cortex-A553Maker product pagedeveloper.roku.com/dev/docs/hardwareRead 7 October 2026Exact Brewster/4850X table: ARM Cortex A55. No SoC/GPU or clock inferred from accelerated graphics API.

Quad-core Cortex-A551Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026Specs tab states Quad-Core Cortex-A55 with no clock speed.

CPU cores

42Press releaseroku.com/blog/new-roku-ultraRead 7 October 2026Launch explicitly all-new quad core processor. No CPU clock or SoC name stated.

41Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026

Max CPU clockiHighest explicitly published processor clock for this device. Generic chipset limits are not device evidence.

Not available

2GHz4Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review CPU performance row: Min 0.5 GHz, Working 1.2 GHz, Max 2 GHz on this device. The 2 GHz figure is a reviewer reading, not a maker claim.

GPU

Not available

ARM Mali-G31 MP21Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026

RAMiKeep published GB values as stated. Convert a source explicitly labelled MB using 1000 MB per GB and preserve its original figure and unit in the note. Do not assume MB means MiB. Convert explicit MiB or GiB to decimal GB through their byte definitions, recording the conversion in the note. This normalization does not establish an exact physical byte count.

2GB3Maker product pagedeveloper.roku.com/dev/docs/hardwareRead 7 October 2026Exact Brewster/4850X row explicitly 2 GB. Direct HTTP fetch returns 403. Readable official web-tool cached page independently opened. Access limit recorded.

2GB1Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026

RAM type

Not available

Not available

StorageiMarketed built-in storage capacity in decimal GB. Free space after the operating system is separate.

4GB8Reviewtomsguide.com/tvs/roku-ultra-2024-reviewRead 7 October 2026Design explicitly only 4 GB internal storage. Maker is silent. No storage technology or external app-install ability inferred.

8GB1Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026Specs tab lists 8GB ROM. The overview footnote says usable space is lower.

Storage type

Not available

eMMC4Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review lists 8 GB eMMC with about 3.5 GB free.5Reviewsmartzone.de/testbericht-xiaomi-tv-box-s-2-genRead 15 October 2026

Expandable storageiCan use added removable or external storage to store installed apps or play media directly. Copying files through a USB data connection alone does not qualify. The source note states whether apps, media or both are supported and names the connection and limitations. Storage must be attached to the streaming device. Cloud and network streaming do not qualify.

Yes1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Local playback via USB port. True covers additional local media storage only, not adding internal capacity or installing apps on USB.

Yes2Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-genRead 15 October 2026Ports section: insert a USB flash disk for local video playback. App installation on USB storage is not stated.4Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review: expandable with a USB memory. Media use is stored. App installation on USB is not stated.

Storage expansion methodsiPublished methods for adding app or media storage. USB support alone does not prove app installation on external storage.

USB mass storage for local media playback1Maker product pageroku.com/products/roku-ultraRead 7 October 2026USB local playback only. App installation on external media unproved.

USB storage for media playback2Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-genRead 15 October 2026USB flash disk for local video playback, as the maker states.4Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026

Connectivity

6 of 7 differ

Wi-Fi

Wi-Fi 61Maker product pageroku.com/products/roku-ultraRead 7 October 2026Networking explicitly 802.11 ax Wi-Fi 6.

Wi-Fi 54Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review states Wifi 5 and regrets that Wi-Fi 6 is missing. Smartzone and Taenk (802.11ac) agree. The maker names no generation.5Reviewsmartzone.de/testbericht-xiaomi-tv-box-s-2-genRead 15 October 2026Review: Wi-Fi 5 only, no external antenna.9Reviewtaenk.dk/test/streaming-og-medieafspillere/xiaomi-tv-box-s-2nd-genRead 15 October 2026Public product data lists Wi-Fi 5 (802.11ac).

Wi-Fi bands

2.4 GHz, 5 GHz1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Networking explicitly 2.4 GHz / 5 GHz. No 6 GHz inferred.

2.4 GHz, 5 GHz1Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026Specs tab states Wi-Fi 2.4GHz/5GHz. It names no Wi-Fi generation.

Wi-Fi MIMOiWritten as 2x2 MIMO when the maker gives the stream count, or MIMO when it does not. 2T2R counts as 2x2. MU-MIMO support alone does not show more than one stream, so it is not stored. Band wording goes in the source note.

MIMO1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Networking explicitly dual-band MIMO. Stream/antenna count not published.

2x2 MIMO11Reviewprofesionalreview.com/2023/08/09/xiaomi-tv-box-s-2nd-gen-review/ampRead 15 October 2026Spanish review spec list: Wi-Fi 5 dual band 2.4/5 GHz 2x2 with MIMO, throughput above 1 Gbps. The maker names no stream count. The same review gives HDMI 2.0a in its port list and HDMI 2.1 in its text, so it is not used for the HDMI version.

Built-in Ethernet speediRated speed of a built-in Ethernet port. An optional USB Ethernet adapter does not count.

100Mbps1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Networking and ports explicitly 10/100 Base-T. Maximum rated built-in link 100 Mbps, not review throughput.

Not available

Optional Ethernet adapter supportiExplicit support for an external Ethernet adapter. Required adapter and connection belong in the source note.

Not available

Yes2Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-genRead 15 October 2026Ports section: Support USB to ethernet adapter. The box has no built-in Ethernet port.

Bluetooth versioniPublished device Bluetooth version. The remote can use a different Bluetooth version.

Not available

5.21Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026

PortsiPhysical device connectors, including a fixed HDMI plug and power-only USB. Excludes connectors on the remote and optional adapters. Count identical connectors in each row.

ARoku Ultra (2024)

Connector	Count	Version	Role	Data speed (Gbps)
USB-A	1	USB 3.0	Local media playback and remote charging	Not available
HDMI	1	2.1b	Video and audio output	Not available
Ethernet	1	Not available	10/100 Base-T networking	0.1
DC power	1	Not available	Power input	Not available

Source1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Ports inventory USB 3.0, HDMI 2.1b, Ethernet 10/100 and Power. Maker back-view photo confirms one of each. TechRadar independently identifies single HDMI, USB-A and Ethernet. Remote USB-C excluded.

BXiaomi TV Box S (2nd Gen)

Connector	Count	Version	Role
HDMI	1	2.1	Video and audio output
USB-A	1	USB 2.0	Media storage and peripherals
3.5 mm audio	1	Not available	Audio output
DC power	1	Not available	Power input

Source1Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026Socket table: HDMI 2.1 x1, USB 2.0 x1, power interface x1, audio output x1. The overview page calls the audio output a headphone jack for external speakers. Reviews say the jack also carries S/PDIF.9Reviewtaenk.dk/test/streaming-og-medieafspillere/xiaomi-tv-box-s-2nd-genRead 15 October 2026Public product data lists one HDMI 2.1 output, one USB 2.0 Type-A, no SD slot and a 3.5 mm audio output. The test results are behind a login and were not used.

Smart home

2 of 3 differ

Thread border router

Not available

Not available

Matter controlleriCan commission and control Matter accessories. Acting as a Matter accessory alone does not qualify.

No8Reviewtomsguide.com/tvs/roku-ultra-2024-reviewRead 7 October 2026Smart-home section explicitly does not adopt any Matter connectivity. Review 2024 hardware, current maker still lists proprietary integrations only. Not inferred from absence in product table.

Not available

Smart home platforms

Roku Smart Home, Apple HomeKit, Google Home, Amazon Alexa1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Compatibility lists Roku Smart Home, Apple HomeKit, Google Home and Alexa. HomeKit is accessory integration, not Matter-controller proof.

Not available

Remote control

8 of 9 differ

Remote model

Roku Voice Remote Pro (2nd edition)1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Remote control and box table explicitly Roku Voice Remote Pro (2nd edition). Original supplied remote, not a later generic replacement.

Not available

Remote connectioniEvery wireless link the included remote uses, to the device or to other equipment. An infrared transmitter that controls the TV counts as infrared.

Not available

Bluetooth, Infrared2Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-genRead 15 October 2026Overview: 360 degree Bluetooth and IR remote control. The footnote says remote appearance and functions vary between markets.

Remote microphone

Yes5Owner's manualsupport.roku.com/en-us/article/learn-about-voice-remote-proRead 7 October 2026Hands-free and push-to-talk control explicitly described for Voice Remote Pro second edition. Slider green enables voice microphone. No capsule count claimed.

Yes2Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-genRead 15 October 20264Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review: Bluetooth remote with a microphone for Google Assistant.

Remote voice assistantsiVoice assistants usable from the supplied remote. Region, language, app and firmware restrictions belong in the source note.

Roku Voice2Press releaseroku.com/blog/new-roku-ultraRead 7 October 2026Supplied second-edition remote supports hands-free Hey Roku voice commands and shortcuts. Other assistant integrations require external devices.

Google Assistant2Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-genRead 15 October 2026Press the Google Assistant button on the remote. Google Assistant is not available in every language and country.

Remote TV controliSupported TV controls, such as power, volume and input. Infrared and HDMI-CEC routes are qualified in source notes.

Power, Volume, Mute5Owner's manualsupport.roku.com/en-us/article/learn-about-voice-remote-proRead 7 October 2026Second-edition description confirms TV power and volume controls. Its exact diagram includes mute among the shared core buttons. TV compatibility and remote setup affect operation. No input switching implied.

Power, Volume2Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-genRead 15 October 2026Built-in IR controls power and volume of the TV or soundbar.

Remote finder

Yes1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Product explicitly lost remote finder. Launch describes box-button and hands-free trigger.

Not available

Remote backlight

Yes1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Product explicitly backlit buttons on supplied Voice Remote Pro.

Not available

Remote poweriPublished batteries or rechargeable battery arrangement for the supplied remote.

Built-in rechargeable lithium-ion battery5Owner's manualsupport.roku.com/en-us/article/learn-about-voice-remote-proRead 7 October 2026Charging section explicitly rechargeable lithium-ion battery. Second-edition full charge 5.5 h and typical 3 months remain in source context, not unsupported schema fields.

2 AAA batteries (not included)5Reviewsmartzone.de/testbericht-xiaomi-tv-box-s-2-genRead 15 October 2026Remote needs 2 AAA batteries that are not included. China-Gadgets says the same.

Remote charging port

USB-C1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Box includes USB-C cable for remote, and launch explicitly USB-C charging for second edition.2Press releaseroku.com/blog/new-roku-ultraRead 7 October 2026Second-edition remote explicitly convenient USB-C charging.

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Software

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Operating systemiPlatform name. The launch version is stored separately from later firmware support.

Roku OS6Owner's manualsupport.roku.com/en-us/article/learn-about-ultraRead 7 October 2026Exact 4850 guide Learn about Roku features identifies Roku OS. Launch OS revision unproved.

Google TV (Android TV OS)1Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026Specs tab states Google TV.2Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-genRead 15 October 2026

Operating system at launch

Not available

Android TV OS 114Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review tested Google TV 11 (32-bit). Smartzone and China-Gadgets also report Android TV 11 at launch. Later firmware can differ.5Reviewsmartzone.de/testbericht-xiaomi-tv-box-s-2-genRead 15 October 2026Test of 25 July 2023: Android TV 11 with the Google TV interface.

App store

Roku Streaming Store6Owner's manualsupport.roku.com/en-us/article/learn-about-ultraRead 7 October 2026Exact-model guide includes Roku Streaming Store link in footer and add-app guidance. Current platform store name.

Google Play4Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Google Play for Google TV is installed.

Casting protocolsiPublished casting or screen mirroring protocols. AirPlay and Google Cast are distinct. App-only playback support does not prove system-wide mirroring.

Apple AirPlay 27Owner's manualsupport.roku.com/en-us/article/360057488733Read 7 October 2026Compatibility table explicitly Ultra 4850 with Roku OS 9.4 or later for AirPlay 2. Apple host requires iOS 12.3 or macOS 10.14.5 or later, same network. Published minimum compatibility is not the launch OS.

Google Cast2Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-genRead 15 October 2026Chromecast built-in requires Chromecast-enabled apps. AndroidPCtv reports no Miracast and no AirPlay.4Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review media sharing line: Google Cast yes, Miracast no, AirPlay no.

Voice assistantsiVoice assistants supported by the device. A remote microphone and hands-free activation are separate features.

Roku Voice, Amazon Alexa, Google Assistant, Apple Siri1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Exact model compatibility supports Alexa and Google Home. Footer explicitly requires Alexa-enabled or Google Assistant-enabled external device. Roku Voice via remote, Siri via separate HomeKit support guide. Not onboard Alexa/Google microphones.7Owner's manualsupport.roku.com/en-us/article/360057488733Read 7 October 2026HomeKit section explicitly Siri control via supported Apple device. Basic remote commands via Siri only within AirPlay session. Google Assistant/Alexa integrations require external assistant devices as product footer states. Roku Voice runs from supplied remote.

Google Assistant2Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-genRead 15 October 2026Google Assistant, started from the remote button. The global page also says Ok Google, which is not taken as proof of hands-free control.

Hands-free voice controliControl the streaming device by voice without pressing a button. This may use built-in microphones or a compatible linked smart speaker, phone or headset. The source note names the required device, connection, software and supported commands. A microphone on a press-to-talk remote alone does not qualify.

Yes2Press releaseroku.com/blog/new-roku-ultraRead 7 October 2026Supplied second-edition Voice Remote Pro explicitly hands-free commands. Enabled remote microphone slider and nearby remote required.

Not available

Mobile remote platforms

Android, iOS6Owner's manualsupport.roku.com/en-us/article/learn-about-ultraRead 7 October 2026Exact 4850 guide Get the Roku mobile app explicitly iOS and Android for player control. No Windows capability inherited.

Not available

Accessibility features

Text-to-speech screen reader, Closed captioning10Owner's manualsupport.roku.com/en-us/article/enable-the-texttospeech-screen-readerRead 7 October 2026Explicit Roku Ultra support for text-to-speech screen reader in US. Software update may be required. Closed captioning separately linked in exact 4850 guide. No audio-description promise for every app.13Owner's manualsupport.roku.com/en-us/article/turn-on-closed-captioningRead 7 October 2026Roku closed captioning on compatible channel content. Available caption tracks and app settings vary. Exact 4850 guide explicitly links this feature.

Not available

Gaming

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Game servicesiPublished native or cloud gaming services. Service availability is time-sensitive. Record software and region requirements in source notes.

Not available

GeForce NOW4Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review says cloud gaming such as NVIDIA GeForce NOW works, or by installing its APK. Account and region requirements apply.

Game controller supportiExplicitly supported controllers or connection methods. Bluetooth alone does not establish game controller support.

Not available

USB game controllers, Bluetooth game controllers4Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review: compatible with Bluetooth or USB gamepads. Models are not named.

Power

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Power supply

External DC adapter1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Supplied external power adapter, dedicated Power connector and 12 V input shown in product details. Not USB-powered.

External DC adapter4Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review lists a DC adapter (5.2 V) and a round power connector on the back. Smartzone says barrel connector. The adapter rating differs between reviews (2.1 A and 2 A), so no adapter output is stored.5Reviewsmartzone.de/testbericht-xiaomi-tv-box-s-2-genRead 15 October 2026Review: external power adapter with a barrel connector.

Rated power inputiDevice input rating, as published. An external adapter output rating is separate.

12 V, 1.5 A1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Power input table literally 12 V - 1.5 A. Device input only. Does not prove included adapter output or power consumption.

Not available

Included adapter outputiRated output of the included power adapter. This is not device power consumption.

Not available

Not available

Max power consumption (claimed)iMaker-published maximum device power consumption. Adapter rating is not proof.

Not available

Not available

Standby power (claimed)iMaker-published device standby consumption under the source conditions.

Not available

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Measured

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Video playback power (measured)iReviewer-measured device consumption. Video format, app, resolution, power measurement point and equipment belong in source notes.

Not available

Not available

Idle power (measured)iReviewer-measured device consumption when idle. Firmware, measurement point and conditions belong in source notes.

Not available

3W4Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review Consumption row reads Off 0.9W, Min 3W, Working 3.8W, Max 7W. Min is read as the lowest reading with the box on and idle. The review gives no method, meter, firmware or measurement point. The Working and Max values are not stored because their app and load are unstated.

Standby power (measured)iReviewer-measured device consumption in standby. Network state, firmware and measurement point belong in source notes.

Not available

0.9W4Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review Consumption row: Off 0.9W. Read as the standby reading, since the box has no hard power switch. Method, meter, firmware and network state are not published.

Boot time (measured)iReviewer-measured time from power-on to usable home screen. Cold boot and standby wake are different. Record timing method and firmware.

Not available

Not available

Dimensions and weight

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DimensionsiDevice body without remote, cables or adapter. Width is left-to-right in normal use, height is bottom-to-top and depth is front-to-back. For a stick, include the fixed plug only when the source does. A stick's length from the plug to its end is depth and its thickness is height. A puck that lies flat has its thickness as height.

Width124.4Height25.4Depth127mm(4.9 × 1 × 5 in)1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Maker size table publishes 124.4 x 127.0 x 25.4 mm without axis labels. Exact 4850R Dell retail table separately identifies width 4.9 inches, depth 5 inches and height 1 inch. Those labels establish the axis order. Stored metric values remain literal maker numbers, without converting rounded inches.15Retailer pagedell.com/en-us/shop/homeentertainment/apd/roku-ultra-4850r-network-audio-video-player-wireless-lan-usb-hdmi-cable-included/7t26pn/4850rRead 7 October 2026Exact 4850R Physical Characteristics names width 4.9 inches, depth 5 inches and height 1 inch. Used only to establish the axis order of maker literal metric dimensions.

Width95.25Height16.7Depth95.25mm(3.8 × 0.7 × 3.8 in)1Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026Maker: length 95.25 mm, width 95.25 mm, thickness 16.7 mm. The box lies flat, so thickness is height. AndroidPCtv lists 95 x 95 x 19 mm and 85 g. The maker values win.

WeightiDevice only, without remote, cable or power adapter. Included fixed cable or plug conditions belong in source notes.

167.2g(5.9 oz)1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Weight table explicitly 167.2 g (5.9 ounces). Player-only product details, no remote or adapter.

142g(5 oz)1Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026Maker 142 g. Taenk lists the same 142 g. AndroidPCtv lists 85 g, which is not used.9Reviewtaenk.dk/test/streaming-og-medieafspillere/xiaomi-tv-box-s-2nd-genRead 15 October 2026Public product data lists 142 g, the same as the maker.

Remote dimensionsiSupplied remote body. Height is its length along the buttons, width is across the buttons and depth is front-to-back.

Not available

Not available

Remote weightiSupplied remote weight. State whether replaceable batteries are included.

Not available

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Certifications

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FCC ID

Not available

2AIMR-MITVMDZ28AA6Spec databaseandroidtv-guide.comRead 15 October 2026The Certifications row links the FCC record 2AIMRMITVMDZ28AA, written here as 2AIMR-MITVMDZ28AA like the Xiaomi TV Stick 4K 1st gen entry. fccid.io blocks automated access, so the record itself was not opened. Treat it as unverified.

Other certifications

Not available

Google TV certified4Reviewandroidpctv.com/xiaomi-tv-box-s-2nd-gen-reviewRead 15 October 2026Review calls it a certified Google TV device and its audio and video certification line names Dolby Atmos, Dolby Vision and HDR10. Only the Google TV certification is stored. No certificate ID is published.

In the box

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In the box

Roku Ultra streaming player, Roku Voice Remote Pro (2nd edition), USB-C charging cable for remote, Premium High Speed HDMI cable, Power adapter1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Exact Model 4850R box inventory lists player, second-edition remote, remote USB-C cable, Premium High Speed HDMI cable and power adapter. No remote headphone jack, batteries or old-model extras imported.

Xiaomi TV Box S (2nd Gen), Remote control, Power adapter, HDMI cable, User manual1Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026Packaging table: box, remote control, user manual, power adapter, HDMI cable. Remote batteries are not listed. Smartzone and China-Gadgets say the batteries are not included.

HDMI cable includediA separate HDMI cable supplied in the box. A fixed HDMI plug or captive lead does not count. A short HDMI extender supplied with a stick counts, and the source note says it is an extender.

Yes1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Exact product box explicitly supplies a separate Premium High Speed HDMI cable.

Yes1Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026Packaging table lists one separate HDMI cable.

Links

Not compared

Product page

www.roku.com/products/roku-ultra1Maker product pageroku.com/products/roku-ultraRead 7 October 2026Exact current 4850R product details, read as ordinary public HTML.

www.mi.com/global/product/xiaomi-tv-box-s-2nd-gen2Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-genRead 15 October 2026

Spec sheet

Not available

www.mi.com/global/product/xiaomi-tv-box-s-2nd-gen/specs1Maker product pagemi.com/global/product/xiaomi-tv-box-s-2nd-gen/specsRead 15 October 2026Global maker specs tab. The UK, DE and AE spec tabs carry identical values.

Manual

image.roku.com/c3VwcG9ydC1B/Roku-Ultra-2024-QSG.pdf14Owner's manualimage.roku.com/c3VwcG9ydC1B/Roku-Ultra-2024-QSG.pdfRead 7 October 2026Exact Roku support model 4850 link points to Roku-Ultra-2024-QSG.pdf. Independently downloaded one-page 2024 guide. No older UltraLT guide used.

www.manualslib.com/manual/3916304/Xiaomi-Mdz-28-Aa.html10Owner's manualmanualslib.com/manual/3916304/Xiaomi-Mdz-28-Aa.htmlRead 15 October 2026Ten-page Important product information booklet titled MDZ-28-AA, hosted on ManualsLib. Only the page title and table of contents were readable, so no value comes from it. Xiaomi publishes no separate user guide that was found.

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

Not available

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Warranty

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Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

1year11Maker spec sheet (PDF)images.thdstatic.com/catalog/pdfImages/5b/5b125123-9613-4138-9e94-2095d9c4cb30.pdfRead 7 October 2026Roku-branded US streaming player warranty. Page 1: one year from original end-user purchase and delivery in US from Roku/authorized seller. Retailer-hosted maker document. Consumer statutory rights excluded.

Not available

Both are also in the API. Back to all streaming devices.