uxcell BJ-10 Wired Continuous Sound Electronic Alarm Buzzer DC 12V 100dB Product Name : Electronic Alarm Buzzer;Model No. : BJ-10;Type : Continuous Sound Rated Voltage : DC 24V;Sound Pressure : 100dB;Body Diameter : 50mm / 2" Overall Size : 63 x 50 x 48mm / 2.4" x 2" x 1.9" (L*W*H);Mounting Hole Diameter : 4mm / 0.15";Wire Length : 18cm / 7.1" External Material : Plastic, Metal;Color : Black, Red Net Weight : 50g;Package Content : 1 x Electronic Alarm Buzzer