Runs off either Dewalt 20V ,Milwaukee 18V or Ridgid 18V Lithium batteries. Lithium Batteries are not included . I hand craft these myself here in Florida. This box can wirelessly test 7-Way Round & Blade type trailers.
4 Way Trailer Light Tester Circuit Functions Brake signal Trailer Plug Tester
4/5 Pin Dual Head Trailer Light Tester for US Standard Trailer Connectors
9101 Trailer Light Tester Box 7-Way Spade Pin 6 4 5 Flat Adapter Kit Brake Light
Light Ranger MUTT: Universal Portable Trailer Light Tester with Water Resistance
Trailer Light tester 7-way RV 4/5 Flat w/ LED Light Indicators