Roku 4 (4400) vs Roku Express 4K (3940)

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4 (4400) compared with Express 4K (3940)

	Roku4 (4400)	RokuExpress 4K (3940)
Overview
Released
Released	October 2015	May 2021
Video and audio
Resolution
Resolution	4K	4K
HDR
HDR	None	HDR10, HDR10+ and HLG (better)
Video
Video	Up to 4K Ultra HD at 60 fps; HDCP 2.2 required for 4K (Roku launch announcement)	Up to 4K at 60 fps (Roku's exact Marlin/3940X developer row); HDCP 2.2 required for 4K/HDR
HDR
HDR	No HDR support (TechRadar)	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	Quad-core Arm processor; maker does not identify the processor model or clock rate	Arm Cortex-A55; OpenGL ES 2.0 (Roku's exact Marlin/3940X developer row)
Memory
Memory	1.5 GB (Roku's exact Dallas/4400X developer row)	1 GB (Roku's exact Marlin/3940X developer row)
Storage
Storage	microSD expands channel/app storage; USB supports local media playback. User-accessible internal capacity is not published in the maker sources used	Internal storage serves system/channel use; maker sources used do not publish user-accessible capacity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 7. Roku lists OS 11.5 as the last supported release for model 4400X; channel availability varies by region and software version	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 5	Wi-Fi 5
Ethernet
Ethernet	Yes	No
Voice remote
Voice remote	Yes	No
Ports
Ports	HDMI, optical digital audio, Ethernet, USB media playback, microSD channel-storage slot and power	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	Dual-band 802.11ac MIMO Wi-Fi (Roku launch announcement)	Dual-band 802.11ac Wi-Fi (Tech Advisor)
Remote
Remote	Original enhanced wireless remote with voice search, headphone socket, motion/game controls and a speaker for the player's remote-finder button. Uses Wi-Fi rather than Bluetooth (Ars Technica)	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 cable and mains adaptor supplied; use the adaptor if the television USB port provides insufficient power
Size
Size	16.5 × 16.5 × 2 cm, width × depth × height (TechRadar)	–
In the box
In the box	Player, enhanced remote and headphones (Roku launch announcement)	Player, infrared remote, batteries, premium high-speed HDMI cable, USB power cable, power adaptor and removable adhesive strip