1Function: The trailer breakaway kit is designed to activate the brake of the trailer when it has disconnected from the tow vehicle. 2LED Indicator: Trailer brake breakaway kit is equipped with LED indicator light, show the state of system is fully charged, charging or recharge. 3High Performance: During a separation, the system works with your trailer's electronic brakes to bring it to a stop much faster than it would on its own. 4Simple Installation: Using an onboard battery attached to the trailer and a switch system connected to both the trailer and the vehicle. 5Excellent Performance: Professional manufacturing, exquisite workmanship, weatherproof and offer ultimate protection for the charger inside.