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:Intermittent Sound Rated Voltage: DC 12VRated Current: 40mASound Pressure: 100dBSound Type:TickingOverall Size: 64 x 40.6 x 42mm/ 2.52 x 1.6 x 1.65 inch(L*W*H)Mounting Holes: 3mm/ 0.12 inchMounting Hole Distance: 52mm/ 2.05 inchWire Length:21cm / 8.27 inchExternal Material: PlasticColor: WhiteWeight: 32g Package Content:1Pcs x Electronic Buzzer