Streaming devices / Compare

Formuler Z12 Ultra vs Roku Express 4K+

A

Product A: Formuler

Z12 Ultra

57 of 97 known

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B

Product B: Roku

Express 4K+

52 of 97 known

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Every value links to where we found it.

Only differences

AFormuler Z12 Ultra

BRoku Express 4K+

General

6 of 8 differ

Series

Z124Press releaseformuler.tv/single-post/introducing-the-new-formuler-z12-ultra-se-z12-proRead 15 October 2026Maker news post says the Formuler Z12 family is expanding with the Z12 Ultra SE and the Z12 Pro.

Express1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026The live roku.com page for this URL now shows another product, so the maker page was read from the Internet Archive capture of 2022-10-10. Product details, model 3941R.

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

K4R1N46Owner's manualdropbox.com/scl/fi/nl6mshn2s8lukdga95pwl/Quick-guide_FORMULER_Z12-Ultra_-EU-UK-_Outline-4.pdfRead 15 October 2026Compliance page lists FCC ID 2AV9UK4R1N4, IC 29328-K4R1N4, Model number K4R1N4, Product name Formuler Z12 Ultra. K4R1N4 is the regulatory model number.

3941R, 3941R21Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Model row 3941R. 3941R2 is the same Express 4K+ device according to Roku's answer on the Best Buy product Q&A page.16Retailer pagebestbuy.com/site/questions/roku-express-4k--streaming-player-hd-4k-hdr-with-roku-voice-remote-with-tv-controls-includes-premium-hdmi-cable-black/6449512/question/f1b4d262-9e14-37b8-b599-10e45fb527a2Read 11 October 2026Best Buy product Q&A, Roku Team answer: both the 3941R and 3941R2 are the same Roku Express 4K+ device. The Roku developer table lists 3941X and 3941X2 as the software model names.

GTIN / EAN

880960457087014Retailer pageautogarsas.lt/en/products/formuler-z12-ultra-4k-bt-android-tv-priedelisRead 15 October 2026Retailer barcode 8809604570870. Satking (RECFOR032) and Swiss Post (article 848338) list the same EAN for the Z12 Ultra with the GTV-BT3 remote.15Retailer pageshop.post.ch/en/electronics/tv/streaming-boxes/formuler-media-player-z-12-ultra/p/848338Read 15 October 2026EAN/GTIN 8809604570870, article 848338.16Retailer pagesatking.de/en/formuler-z12-ultra-bt3-edition-4k-uhd-android-12-ip-receiverRead 15 October 2026EAN 8809604570870, product number RECFOR032.

Not available

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

31 August 20253Press releaseformuler.tv/single-post/2025-formuler-z12-ultra-releaseRead 15 October 2026Maker news post dated Aug 31, 2025 titled 2025 Formuler Z12 Ultra Release. It gives no price or release date.

13 April 202112Press articletechcrunch.com/2021/04/13/roku-launches-a-rechargeable-hands-free-voice-remote-and-other-devices-rolls-out-roku-os-10Read 11 October 2026Article dated 2021-04-13 announces the Roku Express 4K+.

Status

Available3Press releaseformuler.tv/single-post/2025-formuler-z12-ultra-releaseRead 15 October 2026The maker's regulatory page and the maker's news list still show the Z12 Ultra as a current Android OTT model, and the Z12 Ultra SE and Z12 Pro were added beside it in 2026.5Maker product pageformuler.tv/regulatoryRead 15 October 2026Z12 Ultra is still listed with its Declaration of Conformity beside the 2026 Z12 models.13Reviewtroypoint.com/formuler-z12-ultraRead 15 October 2026Review of 31 Oct 2025 by a buyer who bought the unit on Amazon. It gives a US price of 229.99 USD, which is a selling price and is not stored as launch MSRP.

Discontinued3Maker product pagedeveloper.roku.com/dev/docs/hardwareRead 11 October 2026Express 4K+ rows (3941X Marlin, 3941X2 Bailey) sit in the Updatable list. Roku says it no longer manufactures these products. Retailers may still hold stock.

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

Roku Streaming Stick Plus (2025)17Maker product pageroku.com/blog/players-25Read 23 October 2026Roku says the Roku Streaming Stick Plus replaces the Roku Express 4K+ at the same price.

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

Not available

$39.9912Press articletechcrunch.com/2021/04/13/roku-launches-a-rechargeable-hands-free-voice-remote-and-other-devices-rolls-out-roku-os-10Read 11 October 2026Express 4K+ at $39.99 in the US. Price excludes sales tax.

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.

EU, GB, US, CA, AU6Owner's manualdropbox.com/scl/fi/nl6mshn2s8lukdga95pwl/Quick-guide_FORMULER_Z12-Ultra_-EU-UK-_Outline-4.pdfRead 15 October 2026The guide is the EU and UK edition and carries a FCC and ISED statement for the US and Canada.8Maker spec sheet (PDF)dropbox.com/scl/fi/1g4ie5cvhm928ohcogoq7/Z12-Ultra_CE-RED.pdfRead 15 October 2026EU Radio Equipment Directive declaration. A separate ACMA declaration covers Australia.

US1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026The page is the Roku US site and the model row is the US retail model 3941R. The maker's launch material and the TechCrunch launch report give US availability.

ColoursiThe maker's own colour names

Black / Rose gold1Maker product pageformuler.tv/z12ultraRead 15 October 2026Tech specs list Color: Black / Rose gold.

Black13Retailer pagequill.com/roku-express-4k-plus-black-3941r/cbs/55407410.htmlRead 11 October 2026Retailer listing for the Roku Express 4K Plus 3941R, colour Black.

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.

Box1Maker product pageformuler.tv/z12ultraRead 15 October 2026A separate box that connects by its own HDMI cable and a 12 V adapter.

Box1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026The maker's product image and the quick start guide show a small separate player that connects to the TV with an HDMI cable. It is not a stick or dongle.

Video output

5 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 pageformuler.tv/z12ultraRead 15 October 2026Tech specs list Output Resolution: 4K (3840 x 2160).

3840 × 2160px1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Tech specs, TV Compatibility: 4K TVs up to 2160p at 60fps (3840 x 2160), needs an HDMI input that supports HDCP 2.2.

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.

60Hz11Press articlecnx-software.comRead 15 October 2026Article of 8 Sep 2025 lists Video Output HDMI 2.0 up to 4K (3840 x 2160) @ 60 Hz with Dolby Vision support. The maker publishes no output refresh rate in text, only 4K 60fps tiles. The article's HDMI 2.0 is not stored, because AndroidTVBox.eu lists HDMI 2.1 for the same port.

60Hz1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Tech specs, TV Compatibility: up to 2160p at 60fps. HDR and chroma conditions are not stated.

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.

AFormuler Z12 Ultra

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

Source11Press articlecnx-software.comRead 15 October 2026One 4K 60 Hz row from the article. Bit depth, chroma and HDR pairing are not published.

BRoku Express 4K+

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

Source1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026One row from the 4K TVs line. HDR, bit depth and chroma are not stated for this row. The HD TVs line states up to 1080p without a rate, so no 1080p row is stored.

HDR formats

HDR10, HDR10+, Dolby Vision, HLG1Maker product pageformuler.tv/z12ultraRead 15 October 2026Page names Dolby Vision and HDR10+ and says 4K HDR across all HDR formats. The maker's specs table adds HLG. HDR10 is covered by the all-formats statement and the Troypoint review.2Maker product pageformuler.tv/specs-1Read 15 October 2026Z12 Ultra column: HDR10+, HLG, Dolby Vision.12Press articleandroidtvbox.eu/formuler-z12-ultra-is-a-new-stylish-4k-rtd1319c-streamer-with-128gb-emmc-and-dolby-vision-atmosRead 15 October 2026Article lists Dolby Vision, Dolby Atmos, HLG and HDR10+.13Reviewtroypoint.com/formuler-z12-ultraRead 15 October 2026Review highlights list Supports Dolby Vision-Atmos, DTS, HDR10, HDR10+, HLG, repeated from the maker's page. No playback test is given.

HDR10, HDR10+, HLG1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Tech specs, 4K HDR TVs: supports HDR10/10+ and HLG. No Dolby Vision is listed.

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.

Not available

2.0b10Reviewtechradar.com/reviews/roku-express-4k-2021Read 11 October 2026Review of the Express 4K+ states 4K HDR streaming at up to 60 frames per second over HDMI 2.0b. No maker page states the HDMI revision.

HDCP version

Not available

2.21Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Tech specs footnote: requires a compatible TV with an HDMI input that supports HDCP 2.2. This is the stated protected-output chain version.

HDMI-CEC

Yes9Maker product pagesupport.formuler.tv/kb/article/166-how-to-use-hdmi-cec-on-your-formuler-deviceRead 15 October 2026Helpdesk article lists applicable models as All and the options Enable CEC, Turn off with TV, Turn on with TV and Use TV remote controller. The page said it was in preview mode when read. Forum users report CEC power control on the Z12 Ultra.

Yes10Reviewtechradar.com/reviews/roku-express-4k-2021Read 11 October 2026Review of the Express 4K+: the remote's volume and power buttons control the TV over HDMI-CEC. Roku's support pages describe CEC settings for Roku players in general.

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

Yes1Maker product pageformuler.tv/z12ultraRead 15 October 2026Page describes Quick Media Switching, which avoids blackout periods when switching between frame rates. A QMS-enabled TV is required for that blackout-free switching. The maker states no separate frame rate matching setting on this page.

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.

Not available

720p to 1080p, 720p and 1080p to 4K1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026HD TVs: up to 1080p with up-scaling from 720p. 4K TVs: up to 2160p with upscaling from 720p and 1080p.

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.

AV1, HEVC, H.264, MVC, AVS, MPEG-1, MPEG-2, MPEG-4, VC-1, Real1Maker product pageformuler.tv/z12ultraRead 15 October 2026Tech specs Video Decoder row: Dolby Vision, 4K@60fps, AV1, H.265 (HEVC), AVS, H.264 (AVC, MVC), Real, MPEG-1/2/4, VC-1. No VP9 is listed, so VP9 is not stored.

H.264, HEVC8Owner's manualsupport.roku.com/article/share-media-over-usb-or-networkRead 11 October 2026Roku Media Player lists H.264/AVC and 4K H.265/HEVC. VP9 and AV1 are stated only for some Roku devices, so they are not stored. This player has no USB port, so the network media-server route applies.

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

AFormuler Z12 Ultra

Codec	Width (px)	Height (px)	Max frame rate (fps)	Bit depth (bits)
AV1	3840	2160	60	10
HEVC	3840	2160	60	10

Source2Maker product pageformuler.tv/specs-1Read 15 October 2026Z12 Ultra column: A/V Decoding 4K@60fps 10-bit, AV1 & HEVC. No profile or level is published for the Z12 Ultra. The Main 10 level 5.1 wording belongs to the Z11 models and is not used.

BRoku Express 4K+

Not available

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

Not available

MKV, MP4, MOV8Owner's manualsupport.roku.com/article/share-media-over-usb-or-networkRead 11 October 2026AVC and HEVC in MKV, MP4 and MOV. Network media-server route. App, firmware and file capabilities apply.

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

Widevine L1, Widevine L31Maker product pageformuler.tv/z12ultraRead 15 October 2026Tech specs DRM row: Widevine L1, L3.

Widevine L1, PlayReady9Maker product pagedeveloper.roku.com/dev/docs/content-protectionRead 11 October 2026Widevine security-level table lists Marlin and Bailey, the Express 4K+ code names, under L1 Players. The page documents PlayReady for Roku OS and lists no exclusion for these code names. App DRM libraries and valid licenses are required.

Audio

5 of 8 differ

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

Dolby Atmos, MPEG-1 Layer 1/2/3 (2-CH), MPEG-2 Layer 1/2, HE-AAC v1/v21Maker product pageformuler.tv/z12ultraRead 15 October 2026Tech specs Audio Decoder row: Dolby Atmos, MPEG-1 Layer 1/2/3 (2-CH), MPEG-2 Layer 1/2, HE-AAC v1/v2. Decoder, output and passthrough roles are not separated by the maker. DTS is named only by the Troypoint review and is not stored.2Maker product pageformuler.tv/specs-1Read 15 October 2026Z12 Ultra column: Dolby Atmos.

Digital stereo, DTS Digital Surround, Dolby-encoded audio, MP3, FLAC, PCM, ALAC, Vorbis, AAC1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Maker lines: digital stereo over HDMI, DTS Digital Surround pass through over HDMI, pass-through of Dolby-encoded audio over HDMI. MP3, FLAC, PCM, ALAC, Vorbis and AAC come from the Roku Media Player page and apply to the network media-server route.

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

Not available

DTS Digital Surround, Dolby-encoded audio1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Literal maker lines. Dolby codecs stay generic because the page does not name Dolby Digital, Dolby Digital Plus or Atmos.

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

Yes1Maker product pageformuler.tv/z12ultraRead 15 October 2026Page and tech specs list Dolby Atmos. Content, app and HDMI audio path requirements apply.

No11Reviewtomsguide.com/reviews/roku-express-4k-plusRead 11 October 2026Review of the Express 4K Plus: no Dolby Vision or Atmos audio. TechRadar and SlashGear agree.

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.

Not available

2.01Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Digital stereo over HDMI. No numeric multichannel layout is stated.

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

Not available

No7Owner's manualsupport.roku.com/en-us/article/how-to-use-bluetooth-headphone-modeRead 11 October 2026Roku Express is listed as a device without Headphone Mode. The Express 4K+ is not in the compatible list. The article names 'Roku Express' without a generation, so Express 4K+ is read as part of that family. A Bluetooth radio version is not published.

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

10 of 11 differ

System on chip

Realtek RTD1319C1Maker product pageformuler.tv/z12ultraRead 15 October 2026Tech specs CPU row names Realtek RTD1319C. The maker lists no separate SoC row.

Not available

CPU

Quad-core Arm Cortex-A551Maker product pageformuler.tv/z12ultraRead 15 October 2026The maker's specs table lists Quad-core (ARM Cortex A55). No clock speed is published.2Maker product pageformuler.tv/specs-1Read 15 October 2026Z12 Ultra column: Quad-core (ARM Cortex A55).

ARM Cortex-A553Maker product pagedeveloper.roku.com/dev/docs/hardwareRead 11 October 2026Express 4K+ rows: ARM Cortex A55. The core count is not stated for this model.

CPU cores

41Maker product pageformuler.tv/z12ultraRead 15 October 2026Maker specs table: Quad-core.2Maker product pageformuler.tv/specs-1Read 15 October 2026Z12 Ultra column: Quad-core.

Not available

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

Not available

Not available

GPU

ARM Mali-G57 MC11Maker product pageformuler.tv/z12ultraRead 15 October 2026

Not available

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.

4GB1Maker product pageformuler.tv/z12ultraRead 15 October 2026Tech specs list 4GB DDR4. The maker names 2666 MHz. CNX Software and AndroidTVBox.eu say 2400 MHz. The maker value wins and no speed field exists.2Maker product pageformuler.tv/specs-1Read 15 October 2026Z12 Ultra column: 4GB DDR4.

1GB3Maker product pagedeveloper.roku.com/dev/docs/hardwareRead 11 October 2026Express 4K+ rows: 1 GB.

RAM type

DDR41Maker product pageformuler.tv/z12ultraRead 15 October 2026

Not available

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

128GB1Maker product pageformuler.tv/z12ultraRead 15 October 2026Tech specs list 128GB eMMC with a footnote that actual user storage is less.2Maker product pageformuler.tv/specs-1Read 15 October 2026Z12 Ultra column: 128GB.

Not available

Storage type

eMMC1Maker product pageformuler.tv/z12ultraRead 15 October 2026

Not available

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 pageformuler.tv/z12ultraRead 15 October 2026The maker's specs table lists Memory Expansion: Micro SD and the tech specs list one Micro SD card slot. The maker does not say whether apps, media or both can use the card.2Maker product pageformuler.tv/specs-1Read 15 October 2026Z12 Ultra column: Memory Expansion Micro SD.

Not available

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

microSD card slot2Maker product pageformuler.tv/specs-1Read 15 October 2026Z12 Ultra column: Memory Expansion Micro SD. The maker does not say whether apps, media or both can use the card.

Not available

Connectivity

7 of 7 differ

Wi-Fi

Wi-Fi 6E1Maker product pageformuler.tv/z12ultraRead 15 October 2026Tech specs list Wireless 6E AX 2x2 (Tri-band).2Maker product pageformuler.tv/specs-1Read 15 October 2026Z12 Ultra column: Wireless 6e ax 2x2 (Tri-band).

Wi-Fi 51Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Networking row: 802.11ac dual-band Wi-Fi (2.4 GHz / 5 GHz). 802.11ac is Wi-Fi 5.

Wi-Fi bands

2.4 GHz, 5 GHz, 6 GHz1Maker product pageformuler.tv/z12ultraRead 15 October 2026Tri-band Wi-Fi 6E covers 2.4 GHz, 5 GHz and 6 GHz.8Maker spec sheet (PDF)dropbox.com/scl/fi/1g4ie5cvhm928ohcogoq7/Z12-Ultra_CE-RED.pdfRead 15 October 2026The declaration applies ETSI EN 300 328 (2.4 GHz), EN 301 893 (5 GHz) and EN 303 687 (6 GHz Wi-Fi), which matches tri-band Wi-Fi 6E.

2.4 GHz, 5 GHz1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Networking row: 2.4 GHz / 5 GHz.

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.

2x2 MIMO1Maker product pageformuler.tv/z12ultraRead 15 October 2026Tech specs list 2x2.

Not available

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

1,000Mbps1Maker product pageformuler.tv/z12ultraRead 15 October 2026Tech specs list Gigabit (1000M).2Maker product pageformuler.tv/specs-1Read 15 October 2026Z12 Ultra column: Gigabit(1000Mbps).

Not available

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

Not available

Yes1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Networking row: wired Ethernet requires a USB adaptor, sold separately. The setup article names the micro USB port. This is not a built-in Ethernet port.15Owner's manualsupport.roku.com/article/connect-to-a-wired-network-with-usbRead 11 October 2026Roku Express 4K+ (3941) is in the compatible device table. It needs a micro USB Ethernet adapter, 10/100 Mbps only, with an AX8877X or SMSC95XX chipset. The adapter is powered separately. This is not built-in Ethernet or storage expansion.

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

5.21Maker product pageformuler.tv/z12ultraRead 15 October 2026

Not available

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.

AFormuler Z12 Ultra

Connector	Count	Version	Role	Data speed (Gbps)
HDMI	1	Not available	Video and audio output	Not available
USB-A	1	USB 3.0	External storage and accessories	Not available
USB-A	1	USB 2.0	External storage and accessories	Not available
Ethernet	1	Not available	Gigabit network	1
microSD	1	Not available	Storage expansion	Not available
Other	1	Not available	Optical S/PDIF audio output	Not available
DC power	1	Not available	Power input	Not available

Source1Maker product pageformuler.tv/z12ultraRead 15 October 2026Tech specs Ports: power input 1, USB 3.0 1, USB 2.0 1, HDMI 1, Gigabit LAN 1, Micro SD card 1, Optical S/PDIF 1. The maker names no HDMI version.

BRoku Express 4K+

Connector	Count	Version	Role
HDMI	1	2.0b	Video and audio output
Micro USB	1	Not available	Power input and compatible optional Ethernet adapter connection

Source1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Ports row lists HDMI, Micro USB and a Reset button. The reset button is not a connector and is not stored. The micro USB role comes from the setup article. HDMI version comes from TechRadar.

Smart home

1 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.

Not available

Not available

Smart home platforms

Not available

Apple HomeKit, Google Home, Amazon Alexa1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Compatibility rows: works with Apple AirPlay and HomeKit, Google Home and Alexa. This does not establish Matter or Thread.

Remote control

7 of 9 differ

Remote model

GTV-BT31Maker product pageformuler.tv/z12ultraRead 15 October 2026Page promotes the BT3 Backlight Remote and the GTV-BT3 Bluetooth Voice Remote. The box contents image shows one remote with the box. The Quick guide names GTV-BT3 in its Find My Remote section.7Maker product pageformuler.tv/gtv-bt3Read 15 October 2026GTV-BT3 Bluetooth Voice Remote.

Roku Voice Remote with TV controls1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Remote control row: voice remote with TV power, volume, and mute buttons. The name 'Roku Voice Remote with TV controls' follows the Roku Express 4K+ retail title.

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.

Bluetooth, Infrared7Maker product pageformuler.tv/gtv-bt3Read 15 October 2026Maker calls it a Bluetooth voice remote. Bluetooth is the link to the box. Infrared is used for the learned TV controls.

Not available

Remote microphone

Yes1Maker product pageformuler.tv/z12ultraRead 15 October 2026The GTV-BT3 is a voice remote with a Voice Assistant feature. The maker does not name the assistant in text.7Maker product pageformuler.tv/gtv-bt3Read 15 October 2026Voice Assistant is a feature of the GTV-BT3. The assistant is not named in the text.

Yes1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Remote control row and the Voice button on the quick start guide diagram. Press-to-talk remote, not hands-free.

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

Not available

Roku Voice1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Voice remote row and the Roku Voice search button. Roku Voice is the only assistant on the supplied remote.

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

Power, Volume, Input source7Maker product pageformuler.tv/gtv-bt3Read 15 October 2026Universal IR Learning: program the remote to manage the TV's power, volume and input source. The side TV buttons use IR while the box link is Bluetooth.

Power, Volume, Mute1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Remote TV power and volume buttons work with most TVs. Mute is the third button named in the Remote control row.

Remote finder

Yes1Maker product pageformuler.tv/z12ultraRead 15 October 20266Owner's manualdropbox.com/scl/fi/nl6mshn2s8lukdga95pwl/Quick-guide_FORMULER_Z12-Ultra_-EU-UK-_Outline-4.pdfRead 15 October 2026Find My Remote page: the GTV-BT3 plays a sound for 30 seconds after the FUNC key on the back of the box is pressed.7Maker product pageformuler.tv/gtv-bt3Read 15 October 2026Find My Remote works from the Formuler Remote app or the function key of the Z12 Ultra.

Not available

Remote backlight

Yes1Maker product pageformuler.tv/z12ultraRead 15 October 20267Maker product pageformuler.tv/gtv-bt3Read 15 October 2026LED backlight with adjustable brightness.

Not available

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

2 batteries included in the box6Owner's manualdropbox.com/scl/fi/nl6mshn2s8lukdga95pwl/Quick-guide_FORMULER_Z12-Ultra_-EU-UK-_Outline-4.pdfRead 15 October 2026What's in the Box page shows 2x Batteries. The battery type is not written.

2 AAA batteries2Owner's manualimage.roku.com/c3VwcG9ydC1B/Roku-Express-4K-Plus-QSG-US-Fall2022-pdf.pdfRead 11 October 2026What's included page: two pre-installed AAA batteries.

Remote charging port

Not available

Not available

Software

6 of 8 differ

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

Android1Maker product pageformuler.tv/z12ultraRead 15 October 2026Tech specs list Android 12 and the page says MYTVOnline 3 comes preinstalled.

Roku OS3Maker product pagedeveloper.roku.com/dev/docs/hardwareRead 11 October 2026Hardware table is the Roku OS developer reference. The player runs Roku OS.

Operating system at launch

Android 121Maker product pageformuler.tv/z12ultraRead 15 October 2026

Not available

App store

Formuler Market and Google Play Store10Maker product pagesupport.formuler.tv/kb/article/99-how-to-install-download-appsRead 15 October 2026Helpdesk article: install apps from the Market app (Home > Market) or from the Google Play Store with your own account, or by side-loading. It names no per-model difference except the Z nano. The Google Play Store is reached through the Market app, which carries a curated list.

Roku Streaming Store4Owner's manualsupport.roku.com/article/1500004688162Read 11 October 2026How to set up your Roku Express 4K+: add new apps from the Streaming Store. The same article lists the box contents and the micro USB port for a compatible Ethernet adapter.

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

Not available

Apple AirPlay 26Owner's manualsupport.roku.com/article/screen-mirror-your-apple-device-with-airplayRead 11 October 2026Roku Express 4K+ (3941) is in the table of devices that support Apple HomeKit and streaming with AirPlay 2 on Roku OS 9.4 or higher.

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

Not available

Roku Voice, Amazon Alexa, Google Assistant, Apple Siri1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Compatibility rows: works with Alexa, Google Home, and Apple AirPlay and HomeKit. Roku Voice runs from the supplied remote. Alexa, Google Assistant and Siri work through other devices. They do not run on the supplied remote.6Owner's manualsupport.roku.com/article/screen-mirror-your-apple-device-with-airplayRead 11 October 2026Apple HomeKit lets you use Siri and the Home app on an Apple device to control the player. Supported on Roku Express 4K+ (3941).

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.

Not available

Not available

Mobile remote platforms

Not available

Android, iOS5Owner's manualsupport.roku.com/article/360063908513Read 11 October 2026Getting to know your Roku Express 4K or Express 4K+: the free Roku mobile app for iOS and Android controls the device by voice.

Accessibility features

Not available

Not available

Gaming

None of 2 known

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

Not available

Not available

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

Not available

Not available

Power

4 of 5 differ

Power supply

External DC adapter1Maker product pageformuler.tv/z12ultraRead 15 October 2026The maker lists a power input and a Power Adapter in the box, with rating 12VDC / 1A.

USB2Owner's manualimage.roku.com/c3VwcG9ydC1B/Roku-Express-4K-Plus-QSG-US-Fall2022-pdf.pdfRead 11 October 2026Step 2 powers the player through the included USB power cable and power adaptor, or from a TV USB port. Power input is micro USB.

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

12 VDC / 1 A1Maker product pageformuler.tv/z12ultraRead 15 October 2026Tech specs: Power rating 12VDC / 1A.

5 V, 1 A1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Power input row: 5V - 1A.

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.

12W1Maker product pageformuler.tv/z12ultraRead 15 October 2026Tech specs: Power Consumption Max. 12W.

Not available

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

0.5W1Maker product pageformuler.tv/z12ultraRead 15 October 2026Tech specs: Standby Power Max. 0.5W (Ultra low power). Stored as the published maximum.

Not available

Measured

None of 4 known

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

Not available

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

Not available

Not available

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

2 of 4 differ

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.

Width135Height24Depth100mm(5.3 × 0.9 × 3.9 in)1Maker product pageformuler.tv/z12ultraRead 15 October 2026Tech specs: Length 135 mm, Width 100 mm, Thickness 24 mm. The box lies flat, so thickness is height and the 135 mm side with the ports is width. Post.ch lists the same 13.5 cm width and 24 mm height.2Maker product pageformuler.tv/specs-1Read 15 October 2026Z12 Ultra column: 135 x 100 x 24 (mm).15Retailer pageshop.post.ch/en/electronics/tv/streaming-boxes/formuler-media-player-z-12-ultra/p/848338Read 15 October 2026Height 2.4 cm, width 13.5 cm, depth 100 mm. This confirms the maker's orientation.

Width86.3Height20.8Depth39.3mm(3.4 × 0.8 × 1.5 in)1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Size row: height 0.8 in (20.8 mm), width 3.4 in (86.3 mm), depth 1.5 in (39.3 mm). Player only.

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

Not available

44.6g(1.6 oz)1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Weight row: 1.6 ounces (44.6 g). Player only, without remote, cable or adapter.

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

Not available

Certifications

1 of 1 differ

FCC ID

2AV9UK4R1N46Owner's manualdropbox.com/scl/fi/nl6mshn2s8lukdga95pwl/Quick-guide_FORMULER_Z12-Ultra_-EU-UK-_Outline-4.pdfRead 15 October 2026Compliance page (page 29 of the PDF): FCC ID 2AV9UK4R1N4 for Formuler Z12 Ultra. The GTV-BT3 remote has its own FCC ID 2AV9U1Y0UN6. fccid.io blocks agents so the FCC record itself was not opened.

Not available

Other certifications

CE RED, FCC, ISED, RCM (Australia)6Owner's manualdropbox.com/scl/fi/nl6mshn2s8lukdga95pwl/Quick-guide_FORMULER_Z12-Ultra_-EU-UK-_Outline-4.pdfRead 15 October 2026The guide carries an FCC and ISED (Canada) compliance statement.8Maker spec sheet (PDF)dropbox.com/scl/fi/1g4ie5cvhm928ohcogoq7/Z12-Ultra_CE-RED.pdfRead 15 October 2026Declaration of Conformity under the Radio Equipment Directive 2014/53/EU for Formuler Z12 Ultra, type Media Box, issued 1 Aug 2024 rev B. The ACMA supplier declaration covers RCM.

ENERGY STAR1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Page text states this Roku player is ENERGY STAR certified. No certificate number or listing was checked.

In the box

1 of 2 differ

In the box

Z12 Ultra media receiver, GTV-BT3 remote control, Silicone remote cover, 2 batteries, HDMI cable, Power adapter, Quick setup guide1Maker product pageformuler.tv/z12ultraRead 15 October 2026Page icons: Media Receiver, Remote Control, Silicone Remote Cover, Batteries, TV Cable, Power Adapter, Quick Setup Guide.6Owner's manualdropbox.com/scl/fi/nl6mshn2s8lukdga95pwl/Quick-guide_FORMULER_Z12-Ultra_-EU-UK-_Outline-4.pdfRead 15 October 2026What's in the Box page: Media Receiver, Remote Control, Silicone Remote Cover, 2x Batteries, TV Cable, Power Adapter. The Quick Setup Guide is the booklet itself.16Retailer pagesatking.de/en/formuler-z12-ultra-bt3-edition-4k-uhd-android-12-ip-receiverRead 15 October 2026Delivery list: streaming box, GTV-BT3 Bluetooth voice remote, silicone remote cover, HDMI cable, power adapter, quick setup guide, batteries for the remote. The page also shows 700 g, which looks like a shipping weight and is not used.

Roku Express 4K+ streaming player, Voice remote with TV power, volume, and mute buttons, 2 pre-installed AAA batteries, USB power cable, Power adaptor, Premium High Speed HDMI cable, Removable adhesive strip for mounting (optional)1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026What's in the box list.

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 pageformuler.tv/z12ultraRead 15 October 2026The box lists a TV Cable. The Quick guide icon shows an HDMI plug. CNX Software and Satking call it an HDMI cable.6Owner's manualdropbox.com/scl/fi/nl6mshn2s8lukdga95pwl/Quick-guide_FORMULER_Z12-Ultra_-EU-UK-_Outline-4.pdfRead 15 October 2026Icon labelled TV Cable shows an HDMI plug on both ends.

Yes2Owner's manualimage.roku.com/c3VwcG9ydC1B/Roku-Express-4K-Plus-QSG-US-Fall2022-pdf.pdfRead 11 October 2026What's included page shows a separate Premium High Speed HDMI cable. Step 1 connects the player to the TV with the included cable.

Links

Not compared

Product page

www.formuler.tv/z12ultra1Maker product pageformuler.tv/z12ultraRead 15 October 2026

web.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plus1Maker product pageweb.archive.org/web/20221010180237/https://www.roku.com/products/roku-express-4k-plusRead 11 October 2026Internet Archive capture of the maker's product page, because the live URL no longer shows this player.

Spec sheet

www.formuler.tv/specs-12Maker product pageformuler.tv/specs-1Read 15 October 2026Maker comparison table of the Z12 Ultra, Z12 Ultra SE and Z12 Pro.

Not available

Manual

www.dropbox.com/scl/fi/nl6mshn2s8lukdga95pwl/Quick-guide_FORMULER_Z12-Ultra_-EU-UK-_Outline-4.pdf6Owner's manualdropbox.com/scl/fi/nl6mshn2s8lukdga95pwl/Quick-guide_FORMULER_Z12-Ultra_-EU-UK-_Outline-4.pdfRead 15 October 2026Quick guide in 16 languages, 32 pages, created 9 Sep 2025. It holds installation steps and the Find My Remote steps and no spec table.

image.roku.com/c3VwcG9ydC1B/Roku-Express-4K-Plus-QSG-US-Fall2022-pdf.pdf2Owner's manualimage.roku.com/c3VwcG9ydC1B/Roku-Express-4K-Plus-QSG-US-Fall2022-pdf.pdfRead 11 October 2026US quick start guide for model 3941, linked from the maker's setup article.

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

Not available

Warranty

1 of 1 differ

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.

Not available

1year14Maker spec sheet (PDF)images.thdstatic.com/catalog/pdfImages/5b/5b125123-9613-4138-9e94-2095d9c4cb30.pdfRead 11 October 2026Roku Limited Warranty page 1: one year for Roku streaming players and included remotes bought by an end user in the United States.

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