6-15V Piezo Electronic Tone Buzzer Alarm Continuous Sound Mounting Hole Details: Color: Black Quantity: 1 pc 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¡À500Hz Drive Method: Drive Circuit Built in Mounting Holes Package includes: 1 x 95DB Piezoelectric Buzzer Alarm