Old HDMI splitter died, so ordered this one for 4K box and TV but honestly most of viewing is 1080p. TVs in both rooms work. Instructions say to make connections and then power on. Comes with USB cable but no power supply so had to plug into back of cable box. if no available USB port to use as a voltage source, you will need to buy a charger. Nice firm connections into box for HDMI cables and for USB input. Smaller form factor than old box as well.
The device has a solid, quality feel, and looks well-made. The HDMI connections have a snug, uniform feel. The indicators for which device is currently selected is easy to read, and selects automatically in the case where only one source is powered on. The switch button has a good, positive feel, and unlike some competing devices, this one does not require a power supply - any power it needs it gets via HDMI.