Descriptions: Plastic housing, DC 12V working voltage, green and red 2 wire, convenient for wiring. An ideal item for industrial use. Specifications:Product Name: Electronic BuzzerModel No: BJ-3Sound-making Type:Continuous SoundRated Voltage: DC 12VRated Current: 40mASound Pressure: 100dBSound Type:Alarm SoundOverall Size: 61 x 42 x 41mm/ 2.4 x 1.65 x 1.61 inch(L*W*H)Mounting Holes: 3 mm/ 0.12 inchMounting Hole Distance: 52mm/ 2.05 inchWire Length:22cm / 8.66 inchExternal Material: PlasticColor: WhiteWeight: 31g Package Content:1Pcs x Electronic Buzzer