uxcell SFM-27 DC 3-24V 2 Wire Industrial Electronic Continuous Sound Buzzer 80dB Product Name : Electronic Alarm Buzzer;Model No. : SFM-27;Sound-making Type : Continuous Sound Rated Voltage : DC 3-24V;Sound Pressure : 80dB;Overall Size : 4.8 x 3 x 1.5mm / 1.9" x 1.2" x 0.6"(L*W*T) Mounting Hole Diameter : 3.8mm / 0.15";Mounting Hole Distance : 35mm / 1.4";Wire Length : 10.5cm / 4.1" External Material : Plastic;Color : Black Weight : 8g;Package Content : 1 x Electronic Alarm Buzzer