Light Car Motorcycle LED Brake Flasher Stop Alert Flash Controller Module Strobe Flashes Tail Waterproof Stop-Alert Brake Light Flasher Safety Module. Each time the brakes are applied, your brake light will rapidly flash and then stay solid until you release the brake. The preprogrammed cycle will start over and repeat each time the brakes are reapplied. Warning to the car drivers behind. Prevent Rear-End Collision. Brake Flash controller is waterproof and shockproof Easy to install and use Usable for any cars Voltage: 12 v Size: 2 Original Genuine Stop-Alert ---------This unit can save your life---------