Product Description Plug-in wireless digital doorbell with blue flashers with CE and ROHS uFully compatible between transmitter and receiver , up to 20000 combinations u16 digital codes to avoid interference u12 music for selection uAdjustable music volume uOperating temperature : -30 to 60℃ uFrequency:315/433MHZ±0.5MHZ For receiver Quiescent current:70-100mA Working current:80-110mA Working voltage : AC110V~130V/220V~240V Max controlling distance : >150M(no obstacles) Power consumption : 1~2W Volume : ≥80db For Transmitter Quiescent current:0mA Working current:<10mA Working voltage : 12V