The IR Extender kit includes: 1xDistribution block 1xIR Receiver 1xPower plug 4xDual IR Emitters (control up to 8 devices) 1xUser Manual Hidden IR Repeater System: The Hidden IR Repeater System allows you to use an existing infrared (IR) remote control to operate up to 6 audio/video (A/V) components. If your Home Theater components are hidden behind closed doors or walls in an entertainment cabinet or equipment closet, the Hidden IR Repeater System is the accessory you need to be able to control your components with your remote Specifications: Receive Frequency: 36kHz to 58kHz Transmit Frequency: 36kHz & 58kHz Power: 12VDC Cord Length: IR Emitter: 10ft(3m) ,IR Receiver: 5ft(1.5m) Dimensions: 90*55*26(mm) Weight: 28g How to install? 1.Tape the emitters on the devices like Cable Boxes, Xbox One, Roku, Apple TV, Nvidia Shield and so on,Please tape on the nearby of infrared receiving point. 2.Fix the receiver on the most convennient place by remote control. 3.Plug the emitters & receiver in the infrared remote repeater,connect to power supplies,then you could use it. Important note: Plasma TV's emit IR frequencies that can interfere with the IR receiver of this device (Not applicable to LCD or LED). This can usually be fixed by placing the IR receiver further away from the plasma TV OR by placing a piece of scotch tape over the IR receiver to reduce. ( the distance between 2 IR receiver should not be less than 6 m to avoid interference) it's sensitivity! This does not occur with LCD or LED What we care: Our biggest concern isn't with earnings or profits,It's with customers' experiences purchasing and using our products. We want satisfied customers and to develop trust in the Tunteil brand. Freely contact us if you have any issues.