Function: 1. Powerful buzzer: our syrena can emit a powerful buzzer with a power of 112 dB ( 3 dB). Once you step back, no one will ignore that buzzer. 2. High-quality materials: The alarm is made of high-quality materials to ensure durability and longevity, and can work at various temperatures. 3. Easy installation: Installation of the alarm is very simple, just connect the cable from the positive screw terminal do of the power cord of the reversing light or reversing switch installed on the dashboard, and then connect the cable do mass (negative). 4. Dust and moisture resistant alarm: The alarm amplifies the sound and protects the speaker, which can prevent dust, moisture and use in all weather conditions. 5. Application: This reversing alarm is designed dla DC powered vehicles with a voltage of 12 to 80 V and automatically adjusts do the voltage range of vehicles with a voltage of 12 to 80 V, including trucks, passenger cars and SUVs. Specification: Item Type: Car Reversing Alarm Size: approx. 104 (L ) x 42 (width ) x 70 (H) ) mm / 4,1 x 1,7 x 2,8 inches Operating voltage: DC 12 V-80 V Operating Current: 1,0A Sound Level: 112dB3 Power: 15 W Operating air pressure: 0,5Mpa-1,0Mpa Application: Used in 12 to 80 V DC vehicles, including trucks, passenger cars, and SUVs. List of packages: 1 x Alarm