The Megatester Multi-Tester is a super bright LED flashlight with a built in electrical tester that can outshine most "D" flashlights, according to the company. It is compact enough to carry all the time and can test almost all un-energized circuits 3V to 220V AC+DC circuits. Megatester can also trace wires and find bad grounds. This unit comes with two holsters: one velcro holster and one belt holster, for convenient access to flashlight and tester at all times. This unit comes with a push-button switch and How-To-Test guide, which explains how to perform basic safe testing. Megatester is made to the highest quality standards, backed by the company's unconditional lifetime guarantee.