SAME AS VIPER 507M

DEI VOXX Directed Viper AudioVox DUB1 digital tilt sensor triggers your car alarm when the angle of your vehicle changes, protecting you against a tow truck, tire thief, or someone going after your custom wheels. When your chassis angle changes slightly, the sensor triggers the alarm. 

The DUB1's digital self-leveling feature adjusts itself automatically based on the position of your parked vehicle.