Roku Express (3930) vs Roku Ultra (4640)

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Express (3930) compared with Ultra (4640)

	RokuExpress (3930)	RokuUltra (4640)
Overview
Released
Released	October 2019	October 2016
Video and audio
Resolution
Resolution	1080p	4K (better)
HDR
HDR	None	HDR10 (better)
Video
Video	Up to 1080p Full HD; no 4K or HDR (exact Nemo/3930X maker developer row)	Up to 4K at 60 fps; HDCP 2.2; upscales 720p and 1080p sources to 4K (Roku launch release reproduced by Display Daily)
HDR
HDR	–	HDR10 (Roku's exact Cooper/4640X developer row); Dolby Vision is not supported
Audio
Audio	–	Dolby Digital and Dolby Digital Plus decoding; optical digital audio output for compatible receivers and soundbars (Roku launch release)
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-A53 quad-core 1.2 GHz; OpenGL ES 2.0 (Roku's Cooper/4640X developer row)
Memory
Memory	512 MB (Roku's exact Nemo/3930X developer row)	1 GB (Roku's exact Cooper/4640X developer row)
Storage
Storage	–	MicroSD slot provides additional channel storage; USB is for local media playback (Roku launch release). No verified built-in user storage 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	Roku OS; apps and features vary by region and software version
Connections
Wi-Fi
Wi-Fi	Wi-Fi 4	Wi-Fi 5
Ethernet
Ethernet	No	Yes
Voice remote
Voice remote	No	Yes
Ports
Ports	HDMI output, micro-USB power and reset; no Ethernet, USB media or card slot	HDMI, Ethernet, optical digital audio output, USB media playback port, microSD slot and power input
Wi-Fi and Bluetooth
Wi-Fi and Bluetooth	Single-band 802.11b/g/n Wi-Fi (Tech Advisor)	Dual-band 802.11ac MIMO (Roku launch release)
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 point-anywhere remote has voice search, headphone jack, headphone volume, gaming buttons and lost-remote finder; no TV volume or power control (The Next Web)
Design
Type
Type	Box	Box
Size
Size	–	4.9 × 4.9 × 0.9 in; fanless design (Tom's Guide)
Power
Power	USB power. The European 3930EU guide excludes a mains adaptor; the original US launch package includes one	–
In the box
In the box	European package includes player, infrared remote, two AAA batteries, HDMI cable, USB power cable and removable adhesive strip	–