Ultra (4640)

Released October 2016

Roku's original 4K HDR Ultra streaming box, with optical audio, Ethernet and USB playback for older home cinema systems.

Type: Box
Resolution: 4K
HDR: HDR10
Software: Roku OS

What reviewers say

Both reviews praised fast, reliable streaming and the broad app selection. Tom's Guide liked the quiet design and useful extra features but criticised the missing HDMI cable and fixed app buttons. The Next Web found the interface dated and inconsistent between apps, and preferred the cheaper Premiere+ unless the Ultra's extra connections were needed.

From tomsguide.com and thenextweb.com

Specifications

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Video and audio

Resolution: 4K
HDR: HDR10
Video: Up to 4K at 60 fps; HDCP 2.2; upscales 720p and 1080p sources to 4K (Roku launch release reproduced by Display Daily)
HDR: HDR10 (Roku's exact Cooper/4640X developer row); Dolby Vision is not supported
Audio: Dolby Digital and Dolby Digital Plus decoding; optical digital audio output for compatible receivers and soundbars (Roku launch release)

Performance

Software: Roku OS
Chip details: Arm Cortex-A53 quad-core 1.2 GHz; OpenGL ES 2.0 (Roku's Cooper/4640X developer row)
Memory: 1 GB (Roku's exact Cooper/4640X developer row)
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: Roku OS; apps and features vary by region and software version

Connections

Wi-Fi: Wi-Fi 5
Ethernet: Yes
Voice remote: Yes
Ports: HDMI, Ethernet, optical digital audio output, USB media playback port, microSD slot and power input
Wi-Fi and Bluetooth: Dual-band 802.11ac MIMO (Roku launch release)
Remote: 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)