Easy to install. Portable carrying Transmitts up to 80 meters(open air) Frequency 433.92MHZ+(-)150KHZ Power: 1*12V 23A Battery for transmitter, 120V/220VAC(10%) for receiver. Two sound for choice: Ding-dong and westminster The plug of receiver can suit the standard outlet.Trademark: WTH Model: TH-A78 Origin: China Packing: Blister packaging Min. Order: 500
