▪Used indoor of similar place, temperature:-10℃~+40℃,relative humidity:45-85%;                                                                                       

▪Press transmitter, the receiver sends nice Ding-dong or Westminster sound;                   

▪Quiescent current is no more than 0.35mA when the receiver is not working;                        

▪Frequency 433.92MHz±150KHz;                                                        

▪Transmits up to 80 meters (open air); 

▪The plug of receiver can suit any standard outlet;

▪CE Approval.