1. material:abs,
2. open the remote and insert the 12v23a battery (small battery,included). 
3. close the remote again and then stick it where you want with theadhesive back. 
4. insert the 2 * aaa batteries (not included) into thereceiver. 
5. use the button on the side of the reciever to change the melodyto your favourite. 
6.press the small gap on the underside of the remote control with aflat screwdriver. 
7.receiver size:9*5*2cm,
transmitter size:7.5*7*1.5cm,
8.voltage: ac 220v/110v, dc 3 v,
9.package weight:110.5g.

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深圳市龙岗区平湖镇博讯通塑胶电子厂
Ruby Liu
13428675490