Roku has launched a new streaming device. Called the Streaming Stick+, it's a dongle that plugs into your telly's HDMI socket, and supports 4K and HDR technologies.
4K packs four times as many pixels as high definition, making for a much sharper picture. HDR, meanwhile, stands for high dynamic range – it creates a greater difference between the light and dark parts of the picture, with more incremental 'steps' in between these extremes. That gives the picture greater depth, making it look more lifelike.
You'll need a TV that's compatible with 4K and HDR to notice any difference though.
The Streaming Stick+ costs $70 (£53).
Roku has also refreshed the basic Streaming Stick – it now includes the Voice Remote.
Roku has updated the Ultra, Express and Express+ boxes too, adding minor tweaks.
Annoyingly, all of these changes only apply to the US for now. Here in the UK, we can only buy the basic Streaming Stick, the Roku 2 and Roku 3, none of which have 4K or HDR. But Roku is holding an event in London on 18th October where it's expected to announce some kind of 4K streaming device for the UK. We'll bring you all the news as it happens.