Roku Express 4K (3940) vs Roku Premiere (4620)

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Express 4K (3940) compared with Premiere (4620)

	RokuExpress 4K (3940)	RokuPremiere (4620)
Overview
Released
Released	May 2021	October 2016
Video and audio
Resolution
Resolution	4K	4K
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	4K UHD up to 60 fps; HDCP 2.2; upscales 720p/1080p to 4K and 720p to 1080p (Roku launch release reproduced by Display Daily)
HDR
HDR	HDR10, HDR10+ and HLG (Roku's exact Marlin/3940X developer row); no Dolby Vision	No HDR in Roku's exact Cooper/4620X developer row and original launch release; distinct from the later HDR-capable Premiere with model number 3920
Audio
Audio	–	Night listening mode adjusts sound levels for consistent volume (Roku launch release)
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)	Arm Cortex-A53 quad-core at 1.2 GHz; OpenGL ES 2.0 (Roku's exact Cooper/4620X developer row)
Memory
Memory	1 GB (Roku's exact Marlin/3940X developer row)	1 GB (Roku's exact Cooper/4620X 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Storage	Internal storage serves system/channel use; maker sources used do not publish user-accessible capacity	–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; apps and features vary by region and software version
Connections
Wi-Fi
Wi-Fi	Wi-Fi 5	Wi-Fi 5
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 and power input only; no Ethernet or microSD card slot (The Gadgeteer)
Wi-Fi and Bluetooth
Wi-Fi and Bluetooth	Dual-band 802.11ac Wi-Fi (Tech Advisor)	Dual-band 802.11ac MIMO (Roku launch release)
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; no microphone or headphone socket. Mobile-app voice search is separate
Design
Type
Type	Box	Box
Size
Size	–	Approximately 5-inch-square black box (The Gadgeteer); original box includes remote, two AAA batteries and power adapter
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	–