Roku 2 XS (3100) vs Roku Express 4K (3940)

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2 XS (3100) compared with Express 4K (3940)

	Roku2 XS (3100)	RokuExpress 4K (3940)
Overview
Released
Released	July 2011	May 2021
Video and audio
Resolution
Resolution	1080p	4K (better)
HDR
HDR	None	HDR10, HDR10+ and HLG (better)
Video
Video	Up to 1080p over HDMI; supplied 3.5 mm-to-RCA cable carries standard-definition composite video and analogue stereo	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
Audio
Audio	Dolby Digital Plus 5.1 passthrough supported by the launch Netflix implementation; surround availability depends on the service and receiver	–
Performance
Software
Software	Roku OS	Roku OS
Chip details
Chip details	ARM11 at 600 MHz (Roku's exact Giga/3100X developer row)	Arm Cortex-A55; OpenGL ES 2.0 (Roku's exact Marlin/3940X developer row)
Memory
Memory	256 MB (Roku's exact Giga/3100X developer row)	1 GB (Roku's exact Marlin/3940X developer row)
Storage
Storage	microSD expands app/game storage, not removable-media playback; supported local files play through USB	Internal storage serves system/channel use; maker sources used do not publish user-accessible capacity
Software and services
Software and services	Roku OS; exact 3100X maker row lists this legacy device's last compatible version as 9.1. Apps and services vary 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 4	Wi-Fi 5
Ethernet
Ethernet	Yes	No
Voice remote
Voice remote	No	No
Ports
Ports	HDMI, Ethernet, USB media, microSD channel-storage slot, 3.5 mm composite/stereo A/V, power and reset	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	802.11n Wi-Fi and 100 Mbit Ethernet (Expert Reviews); Bluetooth for the gaming remote (Roku launch release)	Dual-band 802.11ac Wi-Fi (Tech Advisor)
Remote
Remote	Original Bluetooth enhanced remote with A/B game buttons, motion sensing and adjustable wrist strap; no microphone, headphone socket or television power controls	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	Less than 2 W stated in the original Roku 2 family announcement; mains power adapter included	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, enhanced remote, two AA batteries, custom composite/stereo A/V cable and power adapter; HDMI and Ethernet cables not included	Player, infrared remote, batteries, premium high-speed HDMI cable, USB power cable, power adaptor and removable adhesive strip