Color: Black, white Alarm Diameter:22mm/0.86″ Alarm Height:10mm/0.39” 2 Mounting Holes distance:30mm/1.18″ 2 Wires length:90mm/3.54″ Buzzer Type: Piezoelectric Sound Pressure Level 95 dB Rate Voltage: 12V DC Operating Voltage: 3 – 24V Max Current Rating 10mA Frequency 3900±500Hz Drive Method: Drive Circuit Built in Mounting Holes Sound:”Di” Continuous