Here's how it works: Each time the brakes are applied, your brake light will rapidly flash on & off 4 times, slow flash 4 times, and then solid until you release the brake. The preprogrammed cycle will start over and repeat each time the brakes are reapplied.
Brake Light Flasher Safety Module
This will alert the traffic behind you to STOP!!!
Prevent Rear-End Collision and May Save Your Life!
Input Voltage: 12-16V
Rated Input Current: 0.8A to 1.2A
Rated Power: 10W to 15W
Working Temperature: -40 to 50 Degrees Celsius
Storage Temperature: -50 to 80 Degrees Celsius
Material: High Quality ABS Plastic
Condition: 100% Brand New
Compatible with regular brake lights and LED clusters
One module converts one brake light, for left and right side brake lights use two modules