GMax Gm54 / Gm67 / Gm78 Wireless LED Brake Light Kit Features Bright, multifunctional LED display is powered by 2 AA batteries and the transmitter works off of the 12v power supply on your ride Totally wireless there is no modification needed to your helmet Not DOT approved Does not replace rear brake lights It is a responsibility of the purchaser to check your state and local regulations before the use of this product