Cautions: When the new device can't be remote controlled, check to see whether the bar codes in emitter and receiver are , whether the indicator light on the emitter is working, whether the cable of receiver is connected properly and whether the buzzer beeps when Power is on. When the receiver can't be controller by emitter, checking to see whether the battery contact normally and whether the Power is enough, replace battery in time when it is out of power. Insensitive remote controlling probably because of interfering environment and the low battery. remove battery when it isn't in used for a long time. wiring properly in accordance with parameters on labels. Otherwise it will directly shorten life of this device or cause malfunction immediately. The antenna mustn't connect with other wires. When these is a code switch on fan, turn the fan to the highest gear remote controlling. The receiver beeps when you click the remote. It might bother some people. make there are enough space in the canopy of the fan or the receiver has to be fit beside. Operating Voltage: AC 90-220V Working Frequency: 50-60Hz Remote Control Distance: More than 20 Support Encoding: 1527 learning code Operating Mode:1527 remote control Loading Power: Ceiling Fan: Max.300W Incandescent Lamp: Max.1000W LED /Energy saving lamp: Max. 200W LED light / energy saving lamp: Max 200W 't over loading! Remote control battery: 2 AAA battery needed (Not Include) Type: 110V Colour: white + black Material: plastic Package Contents: 1 * Controller 1 * Remote control 1 * Wall Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.