1) Receiver Operating voltage: 220V， operating current ��120mV (220V)， the quiescent current ��120mA (220V time);2) Power: �Q 2W;3) Music: 36 polyphonic music to choose from;4) Operating frequency: 315MHZ;5) Controlled Volume: 25-80dB (4-speed volume control option);6) remote control / receiver distance �R 100m (open area);7) AC terminal (pin): round plug (EURO);7) Transmitter Operating Frequency: 315MHZ;8) transmitter operating voltage: 12V (Battery Model: 23A 12V);9) transmitter operating current �Q 15mA (20 times a day by the calculation， a high quality battery can use for one year);10) LED Indicator: press the launch button， the transmitter's LED indicator light emitter work and the receiver receive instruction， also madeThe sounds of music， remind you have VIP visits， while LED lights on the receiver is also accompanied by music regularly flashing;11) This paragraph doorbell have seepage water features to meet customer placed outside the door;12) Temperature: -10 �� ~ 50 ��Packageincluded:1x transmitter1x receiver1x sticker2x screws