arkivoAPI
Menu

TV and audio / Streaming devices

Roku Express 4K+

RokuStreaming device

Express 4K+

Released May 2021.12Press articletechcrunch.com/2021/04/13/roku-launches-a-rechargeable-hands-free-voice-remote-and-other-devices-rolls-out-roku-os-10Read 11 October 2026Goes on sale in the US in mid-May 2021. AFTVnews and Tom's Guide also give mid-May. Last checked 23 October 2026.

Max output resolution
3840 × 2160
HDR formats
HDR10, HDR10+, HLG
Operating system
Roku OS
Storage
Not available

52 of 97 fields known.

Compare with another streaming deviceDownload JSONDownload CSVGet it from the API

At a glance

Ports

  • HDMI 2.0b
  • Micro USB

All specs

SourceCalculated

General

Series
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 numbers
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
Not available
Announced
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
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.
Predecessor
Not available
Successor
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)
$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)
Not available
Markets
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.
Colours
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 factor
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

Max output resolution
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 rate
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 modes
Width (px)Height (px)Refresh rate (Hz)
3840216060
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+, 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 profiles
Not available
HDMI version
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
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
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 matching
Not available
Dynamic range matching
Not available
Upscaling
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

Video codecs
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 limits
Not available
Video containers
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 systems
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

Audio formats
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 formats
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 Atmos
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 configurations
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 rate
Not available
Max audio bit depth
Not available
Bluetooth audio output
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 codecs
Not available

Processor and memory

System on chip
Not available
CPU
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
Not available
Max CPU clock
Not available
GPU
Not available
RAM
1GB3Maker product pagedeveloper.roku.com/dev/docs/hardwareRead 11 October 2026Express 4K+ rows: 1 GB.
RAM type
Not available
Storage
Not available
Storage type
Not available
Expandable storage
Not available
Storage expansion methods
Not available

Connectivity

Wi-Fi
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 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 MIMO
Not available
Built-in Ethernet speed
Not available
Optional Ethernet adapter support
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 version
Not available
Ports
ConnectorCountVersionRole
HDMI12.0bVideo and audio output
Micro USB1Not availablePower 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

Thread border router
Not available
Matter controller
Not available
Smart home platforms
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

Remote model
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 connection
Not available
Remote microphone
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 assistants
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 control
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
Not available
Remote backlight
Not available
Remote power
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

Software

Operating system
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
Not available
App store
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 protocols
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 assistants
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 control
Not available
Mobile remote platforms
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

Gaming

We could not find any of these 2 fields. Show them
Game services
Not available
Game controller support
Not available

Power

Power supply
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 input
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 output
Not available
Max power consumption (claimed)
Not available
Standby power (claimed)
Not available

Measured

We could not find any of these 4 fields. Show them
Video playback power (measured)
Not available
Idle power (measured)
Not available
Standby power (measured)
Not available
Boot time (measured)
Not available

Dimensions and weight

Front and side, drawn to scale.

Dimensions
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.
Weight
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 dimensions
Not available
Remote weight
Not available

Certifications

FCC ID
Not available
Other certifications
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

In the box
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 included
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.

Warranty

Manufacturer warranty (source market)
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.

Compare with

Pick a streaming device to see both side by side. Differences are marked yellow.

More streaming device comparisons

Sources

We read 17 sources for this streaming device. The numbers match the markers in the sheet.

  1. Read 11 October 2026Backs 29 fields
  2. Read 11 October 2026Backs 4 fields
  3. Read 11 October 2026Backs 4 fields
  4. Read 11 October 2026Backs 1 field
  5. Read 11 October 2026Backs 1 field
  6. Read 11 October 2026Backs 2 fields
  7. Read 11 October 2026Backs 1 field
  8. Read 11 October 2026Backs 2 fields
  9. Read 11 October 2026Backs 1 field
  10. Read 11 October 2026Backs 2 fields
  11. Read 11 October 2026Backs 1 field
  12. Read 11 October 2026Backs 3 fields
  13. Read 11 October 2026Backs 1 field
  14. Read 11 October 2026Backs 1 field
  15. Read 11 October 2026Backs 1 field
  16. Read 11 October 2026Backs 1 field
  17. Maker product pageroku.com/blog/players-25
    Read 23 October 2026Backs 1 field

See a wrong value? Tell us and name the field.