A new image of the unanounced Roku 4, published by ZatzNotFunny, confirms the rumored 4K streamer will indeed include both an optical audio port and a microSD slot. That’s something the new Fire TV does not have since Amazon decided to forgo the 1st generation Fire TV’s optical audio to fit in a microSD slot. Since this new Roku 4 image is straight on, unlike the one I uncovered last week, and reveals the ports, we can estiamate the size of the device by using the port sizes as a frame of referance. I estimate the Roku 4 will be around 160mm wide (6.3 inches), making it wider than the Fire TV (115mm wide) but narrower than the Nvidia Shield (210mm wide). If you’re dead set on a 4K streaming device with an optical port, the Roku 4 looks like the way to go. Well, that, or you could just get an HDMI audio extractor.