The transmitter and receiver are used in pairs, without setting, without external power supply, can substitute HDMI cable to achieve long distance transmission. HDMI Extender is HDMI to RJ45 Extender Adapter Support CAT-5e/6 cable, works for HDTV, Set-top Boxes, DVD, PS4, STB, HOME&Hotel Projector Data Monitoring Center, Large Conference Center. Plug and play, no software required. Metal shell, more durable. Support EDID, compatible with various display devices. Power over Ethernet. Connect the source (computer, laptop) and the TX with the included USB cable to start the device. (NEED 5V/1A) What You Get: 1x HDMI Extender(set), 1x USB Power Cable