Trailer Parts Pro 12 Volt Breakaway Kit w/LED Charge Indicator This kit contains everything you need in a breakaway kit. It includes the breakaway switch, battery, box with LED charge indicator, charger, and mounting hardware. Replacement parts are available if needed. Activates trailer brakes upon separation from the tow vehicle Built-in LED battery meter verifies battery charge LED's indicate: fully charged, re-charge, or charging Complete system includes: box, battery, charger, 7" switch, and hardware Built-in battery charger- charges battery while connected with the tow vehicle 1-2 axle capacity 5-amp hour battery 5-5/8" Wide x 5-1/8" Tall x 4-1/8" Deep Side-Mount installation design