Trailer Breakaway Kit - LED Readout - Breakaway Switch - Battery - Built-in Charging Circuit LED Full Set Up Clam Shell Break Away System Includes Battery Box w/LED Readout , J-ELEC Breakaway Switch and Battery Built-in Charging Circuit and LED Test Button for Easy Check of the Battery Charge State Mounting: Use the Two Provided J-TAP Self Tapping Bolts Wired with 15 leads