Descriptions:Plastic housing, 5V working voltage, 2 terminals, convenient for wiring.A great item for industrial use.Specifications:Product Name: Electronic BuzzerRated Voltage: 5VSound Pressure: 90dBFrequency: 2.3KHzSize: 12mm x 9.5mm/ 0.47 inch x 0.37 inch(D*H)Terminal Length: 5mm/ 0.2 inchExternal Material: ABSColor: BlackPackage Content:6 Pcs x Electronic Buzzer