Roku Express 4K (3940) vs Roku Express+ (3710)

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Express 4K (3940) compared with Express+ (3710)

	RokuExpress 4K (3940)	RokuExpress+ (3710)
Overview
Released
Released	May 2021	October 2016
Video and audio
Resolution
Resolution	4K (better)	1080p
HDR
HDR	HDR10, HDR10+ and HLG (better)	None
Video
Video	Up to 4K at 60 fps (Roku's exact Marlin/3940X developer row); HDCP 2.2 required for 4K/HDR	Up to 1920 × 1080 playback; interface renders at 1280 × 720 (Roku's exact Littlefield/3710X developer row). Composite output serves legacy televisions, not HD playback
HDR
HDR	HDR10, HDR10+ and HLG (Roku's exact Marlin/3940X developer row); no Dolby Vision	–
Performance
Software
Software	Roku OS	Roku OS
Chip details
Chip details	Arm Cortex-A55; OpenGL ES 2.0 (Roku's exact Marlin/3940X developer row)	MIPS processor at 900 MHz (Roku's exact Littlefield/3710X developer row)
Memory
Memory	1 GB (Roku's exact Marlin/3940X developer row)	512 MB (Roku's exact Littlefield/3710X developer row)
Storage
Storage	Internal storage serves system/channel use; maker sources used do not publish user-accessible capacity	–
Software and services
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	Roku OS; US launch model was exclusive to Walmart. App availability varies by region and software version
Connections
Wi-Fi
Wi-Fi	Wi-Fi 5	Wi-Fi 4
Ethernet
Ethernet	No	No
Voice remote
Voice remote	No	No
Ports
Ports	HDMI output, micro-USB power/compatible Ethernet adaptor connection and reset. No built-in Ethernet socket; USB Ethernet adaptor sold separately	HDMI output, composite A/V jack, USB power input and reset button; HDMI and red/white/yellow composite cables supplied (Roku's 2016 quick-start guide)
Wi-Fi and Bluetooth
Wi-Fi and Bluetooth	Dual-band 802.11ac Wi-Fi (Tech Advisor)	802.11b/g/n (Roku launch release); 2.4 GHz only (CGMagazine)
Remote
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	Original infrared remote with navigation, playback and app shortcuts; must remain within line of sight. Mobile-app voice search is separate from the supplied remote
Design
Type
Type	Box	Box
Size
Size	–	Supplied adhesive strip mounts the player to a television; maker guide warns against placing the player behind the TV or inside a cabinet
Power
Power	USB power cable and mains adaptor supplied; use the adaptor if the television USB port provides insufficient power	–
In the box
In the box	Player, infrared remote, batteries, premium high-speed HDMI cable, USB power cable, power adaptor and removable adhesive strip	–