Allows you to warn others with a beep-beep whenever your car is in reverse. Provides the added safety normally associated with larger vehicles but at a nondisruptive sound level. Installation is as easy as changing a light bulb. Simply replace 1 of your existing backup lights with this combination halogen light bulb and backup alarm. Perfect for cars, vans, SUV's, light trucks, and RV's. No. 20100VA: 1156 bulb with round socket No. 20101VA: 3156 bulb with flat socket
