Review on 🔌 eSynic 1x2 HDMI Splitter: 4K HDMI Amplifier Adapter | Aluminum Ver 1.4 | Supports 3D 4K@30HZ Full HD1080P | Ideal for PC PS3 PS4 Blu-ray Player HDTV by Eric Kim

Ordered based on positive reviews. Arrived, connected power supply, HDMI input and 2 HDMI outputs. The power indicator on the splitter came on, but none of the HDMI indicators came on. I've tried different cables with no success so I sent it back. Given the 4.5/5 stars I made one last try and ordered more. The second worked like a charm. Used to duplicate a 4K input in multiple rooms, each HDMI cable is approximately 50 feet long with no degradation or delay. So if yours doesn't work out of the box, you may have just gotten a non-working one, so try again.