Roku · Roku
Express 4K (3940)
A compact 4K streaming box with HDR10+, dual-band Wi-Fi and a standard infrared remote; wired networking needs a separate USB adaptor.
Model history · 2 models, 2018–2021
- 2018Premiere (3920)Compare
- 2021Express 4K (3940)
- Type
- Box
- Resolution
- 4K
- HDR
- HDR10, HDR10+, HLG
- Software
- Roku OS
What reviewers say
Both UK reviews praised its responsive interface, broad app support and inexpensive 4K streaming. They found the basic remote the main compromise, requiring a second remote for television controls and a phone for voice search. Cord Busters also noted limits to cross-service search and occasional app keyboard problems.
From techadvisor.com and cordbusters.co.uk
Specifications
Report a wrong or missing specVideo and audio
- Resolution
- 4K
- HDR
- HDR10, HDR10+ and HLG
- Video
- Up to 4K at 60 fps (Roku's exact Marlin/3940X developer row); HDCP 2.2 required for 4K/HDR
- HDR
- HDR10, HDR10+ and HLG (Roku's exact Marlin/3940X developer row); no Dolby Vision
Performance
- Software
- Roku OS
- Chip details
- Arm Cortex-A55; OpenGL ES 2.0 (Roku's exact Marlin/3940X developer row)
- Memory
- 1 GB (Roku's exact Marlin/3940X developer row)
- Storage
- Internal storage serves system/channel use; maker sources used do not publish user-accessible capacity
- Software and services
- Launched with Roku OS 10. App availability varies by region and software version. May 2021 on-sale month is from the exact UK Tech Advisor review; the maker developer table gives only 2021. Cord Busters identifies this model as the UK replacement for Premiere 3920
Connections
- Wi-Fi
- Wi-Fi 5
- Ethernet
- No
- Voice remote
- No
- Ports
- HDMI output, micro-USB power/compatible Ethernet adaptor connection and reset. No built-in Ethernet socket; USB Ethernet adaptor sold separately
- Wi-Fi and Bluetooth
- Dual-band 802.11ac Wi-Fi (Tech Advisor)
- Remote
- Original standard infrared remote with channel shortcuts; no microphone, television power/volume controls or headphone socket. Express 4K+ 3941 includes the voice remote instead
Design
- Type
- Box
- Power
- USB power cable and mains adaptor supplied; use the adaptor if the television USB port provides insufficient power
- In the box
- Player, infrared remote, batteries, premium high-speed HDMI cable, USB power cable, power adaptor and removable adhesive strip
Pros and cons
Pros
- 4K playback at up to 60 fps with HDR10+, HDR10 and HLG
- Dual-band Wi-Fi and optional USB Ethernet
- HDMI cable and power adaptor supplied
Cons
- No Dolby Vision
- Original infrared remote lacks voice and television controls
- No built-in Ethernet socket
Closest rivals
Model | Type | Resolution | HDR | Software | Released |
|---|---|---|---|---|---|
| Box | 4K | Dolby Vision, HDR10, HLG | tvOS | May 2021 | |
| Box | 4K | Dolby Vision, HDR10+, HDR10, HLG | Fire OS | Oct 2022 | |
| Box | 4K | Dolby Vision, HDR10+, HDR10, HLG | tvOS | Nov 2022 |
Previous model: Premiere (3920).
Sources
- support.roku.com/en-gb/article/set-up-your-express-4k
- image.roku.com/c3VwcG9ydC1B/Roku-Express-4K-QSG-US-Fall2022.pdf
- developer.roku.com/dev/docs/hardware
- techadvisor.com/article/722305/roku-express-4k-review.html
- cordbusters.co.uk/roku-express-4k-uk-review
Photo: Original Roku Express 4K official product image reproduced by Cord Busters
