Breakaway kit brings your trailer to a safe stop by applying the brakes if the trailer separates from the tow vehicle. LED lights indicate current battery status Green = fully charged Yellow = charging Red = recharge needed. Bolt-on mounting system for secure installation on the trailer. Meets DOT requirements for holding / breakaway situations. Required in most states. Application: 1 or 2 axle trailers with electric brakes. Battery capacity: 5 amp-hours.