Proportional braking technology. Inertia activated accelerometer instantly activates brakes. Controller mirrors braking action of tow vehicle, greatly reducing stopping distance. 5 on-the-fly sensitivity adjustments. Percentage of braking power shown on digital LED (light emitting diode) display. Plug-In Simple connection reduces installation time to minutes and allows for quick removal. Connects to OE wiring harness under dash - Plug in Simple Hopkins connector plug to brake control. Innovative vertical slide matches the way a driver reaches for the brake control. Short proof protected. Flexible mounting options - self-leveling.WARNING: This product can expose you to chemicals including DEHP which is known to the State of California to cause cancer and birth defects or other reproductive harm.For more information go to