Usage Tips:Features: With 1 receiver which picks up the signal from the remote controller, the receiver is with a convenient IR confirmation LED. With 1 emitters which is used to send the signals to the A/V components. This IR Repeater System Kit allows you to control home theater devices/ components which are kept behind closet doors or in a closed cabinet. Or do you want to control an IR signal devices between two rooms such as adjusting the volume of the amplifier from somewhere. This item allows you to use an existing infrared remote controller to operate an audio/video (A/V) component. For example: amplifier, cable box, stereo receiver, satellite TV receiver, CD player, DVD player, Blu-ray player or any other components which is controlled by IR signal. 5V USB AC Power Supply. 34-60kHz operating range. Easy Installation: 1. Stick the Receiver in a convenient location that you want with the included double sided tape. 2. Stick the IR emitters (the smaller one) on devices that you want to control. size: The mitting line is 2 meters long and the receiving line is 1.4 meters long Material: Plastic+metal colour: black Package Contents: 1 x IR Infrared Remote Control Receiver 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.