Feature: 1. Powerful Buzzer: Our siren can emit a powerful buzzer of 112dB (±3dB). When you back up, no one will ignore this buzzer. 2. High Quality Materials: The alarm is made of high quality materials to ensure durability and service life, and can work in various temperature environments. 3. Easy to Install: The alarm is very easy to install, you only need to connect the wire from the positive screw terminal to the reversing light power cord or the reversing switch installed on the dashboard, and then connect the wire to the ground (negative). 4. Dust Moisture Proof Alarm: The alarm enhances the sound and protects the speaker, which can prevent dust, humidity and all weather use. 5. Application: This backup alarm is designed for 12‑80 volt DC vehicles and will automatically adjust to the voltage range of 12‑80 volt vehicles, including trucks, cars, and SUV. Specification: Item Type: Car Backup Alarm Size: Approx. 104(L) x 42(W) x 70(H)mm / 4.1 x 1.7 x 2.8in Working Current: 1.0A Sound Level: 112dB±3 Power: 15W Operating Air Pressure: 0.5Mpa-1.0Mpa Application: Used for 12-80 Volt DC Vehicles, including Trucks, Cars, SUV.. Package List: 1 x Alarm