Each Brake Flasher is tested simulating the deceleration that it would sense inside a hard braking vehicle, to see that it flashes at about .4 G. Instructions are included explaining how this can be adjusted for lighter or harder braking.
With your order you get...
A 100% tested Quick Brake Flasher
Complete operation and the easy installation instructions
Quick delivery, only 3 to 7 days shipped via U.S. mail