This custom-built tester box runs on aMilwaukee M12 drill battery (battery not included) and uses aninline fuse for circuit protection. The system distributes power throughsix independent switches, allowing you to test each lighting function individually.
This product would be ideal for electricians, mechanics, or DIY hobbyists who require a portable and rechargeable tester for safely checking fuses, lights, or electrical components in semi-trailers or other vehicles.
