<ul><li>Product Name : Electronic Alarm Buzzer;Model No. : SFM-27;Sound-making Type : Continuous Sound</li><li>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)</li><li>Mounting Hole Diameter : 3.8mm / 0.15\";Mounting Hole Distance : 35mm / 1.4\";Wire Length : 10.5cm / 4.1\"</li><li>External Material : Plastic;Color : Black</li><li>Weight : 8g;Package Content : 1 x Electronic Alarm Buzzer</li></ul><br><br>Black plastic housing, DC 3-24V working voltage, and red black 2 wire, convenient for wiring.\nGood item for industrial use.

uxcell SFM-27 DC 3-24V 2 Wire Industrial Electronic Continuous Sound Buzzer 80dB