Door Bell, Door Chime,Door Buzzer - Intelligent Wireless Remote Control Doorbell 9520FD - White. Smart looking housing with flash light. Flash light on when visitors pressing the remote button. Long operating range: 150 meters( Super long distance digital control).
The work voltage of the receiver: DC3V Batteries Model: AA Static electricity of the receiver ≦0.45mA (Ultra-low power, can extend battery life) Work Frequency ： 315MHz Remote Control / Incept Distance ≧40m(in open air)
Work Frequency ：315MHzRemote Control /Incept Distance≧40m(in open air)Work Voltage of the Emitter：12V(Battery Model：23A12V)Work Electricity of the Emitter≦15mA(20 times a day by calculating, a high quality battery can use for a year)