Roku Express (3930) vs Roku Express 4K (3940)

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Express (3930) compared with Express 4K (3940)

	RokuExpress (3930)	RokuExpress 4K (3940)
Overview
Released
Released	October 2019	May 2021
Video and audio
Resolution
Resolution	1080p	4K (better)
HDR
HDR	None	HDR10, HDR10+ and HLG (better)
Video
Video	Up to 1080p Full HD; no 4K or HDR (exact Nemo/3930X maker developer row)	Up to 4K at 60 fps (Roku's exact Marlin/3940X developer row); HDCP 2.2 required for 4K/HDR
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-A53; OpenGL ES 2.0 (Roku's exact Nemo/3930X developer row)	Arm Cortex-A55; OpenGL ES 2.0 (Roku's exact Marlin/3940X developer row)
Memory
Memory	512 MB (Roku's exact Nemo/3930X developer row)	1 GB (Roku's exact Marlin/3940X 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Storage	–	Internal storage serves system/channel use; maker sources used do not publish user-accessible capacity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	Roku OS; apps vary by region and software version. Maker September 2019 release gives October retail availability, rather than the announcement day	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	Wi-Fi 4	Wi-Fi 5
Ethernet
Ethernet	No	No
Voice remote
Voice remote	No	No
Ports
Ports	HDMI output, micro-USB power and reset; no Ethernet, USB media or card slot	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
Wi-Fi and Bluetooth	Single-band 802.11b/g/n Wi-Fi (Tech Advisor)	Dual-band 802.11ac Wi-Fi (Tech Advisor)
Remote
Remote	Standard infrared remote with channel shortcuts; needs line of sight. No voice microphone, television power/volume controls or headphone socket. Express+ 3931 adds the voice-remote bundle	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
Type	Box	Box
Power
Power	USB power. The European 3930EU guide excludes a mains adaptor; the original US launch package includes one	USB power cable and mains adaptor supplied; use the adaptor if the television USB port provides insufficient power
In the box
In the box	European package includes player, infrared remote, two AAA batteries, HDMI cable, USB power cable and removable adhesive strip	Player, infrared remote, batteries, premium high-speed HDMI cable, USB power cable, power adaptor and removable adhesive strip