1.The work voltage of the receiver:AC 90-26V , woking current:≤60mA                                         2.Static current≤7mA(Ultra-low power ,can extend battery life)
3.Power≤2W
4.Music: 36 chord music for option
5. Sound:20-80dB ( 4 grad volumes);                                                              
6.Remote Control / Inception Distance 200m(in open air)                                        
7.Work Frequency :433MHz                                                                                              
8.Work Voltage of the Emitter:12V(Battery Model:23A 12V)
9..Work Electricity of the Emitter≤15mA(20 times a day by calculating,a high quality                                        
10.LED Indicator: press the send button,LED indicator light will flash,Emitter work and the receiver receive 
the order and then send out the beautiful music reminded you the VIP visit,the blue-ray LED of the receiver 
will regular flash along with the music.                                                
11. This product is of waterproof function and can be put outside the door                                                    
12. Temperature: -10°c~50°c