Feature:1. The product uses ABS material, will not corrode in harmful environments, which is durable, and the motor failure is less2. Continuous loud alarm sound with 95 decibels, easy for you to find the alarm sound in time3. The product uses a good-quality motor, which is sensitive to trigger and has excellent alarm performance4. Rated voltage is 12V, working voltage from DC3-24V, oscillation frequency is 2800500Hz5. Support working temperature is from 20 to and80, very practical, and the driving method is piezoelectricSpecification:Item Type: Alarm BuzzerMaterial: ABS materialModel: 4216Rated Voltage: 12VWorking Voltage: DC 3-24VOscillation Frequency: 2800500HzWorking Temperature: -20 to and80Drive Mode: PiezoelectricActive Head: ActivePurpose: High-decibel signal alarm.Package List:4 x Alarm Buzzer