It easily checks for circuit faults, including shorts, open wiring, miswires, and crossovers before or after installation.
Detachable Remote Module: The smaller piece on the right slides off the main body, allowing you to test the far end of pre-installed or long-run cables spanning different rooms.
Display & Power: Features simple one-button operation with multi-LED indicators that clearly display line conditions and battery status. It is powered by a standard 9V alkaline battery.