Applies to all remote control devices USB cable Length from to Receiver: Approx. 137 cm / 53.94 inch Cable Length Receiver Transmitter To: approx 198 cm / 77.95.inch The Way To achieve power: Appliance USB or 5V Supply power: 5V Suitable for TV set, STB, DVD, DVR, PVR, video recorder, satellite receiver, and so on How to install: 1. Use the double-sided adhesive to stick the receiver in an ideal location. 2. Stick infrared device emitting head that you want to control Note: Do not support windows 10! Material: plastic colour: black Package Contents: 4 x Infrared Remote Control Receiver IR Extender Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.