The Fluke 337 TRMS AC/DC Clamp Meter allows you to work quickly and easily in narrow and dark locations and makes it possible to keep track of your measurements for further analysis. It takes precise measurements and features a large display that is backlit so readings can be taken in virtually any lighting situation. Auto-shut-off maximizes battery life so the meter works when you need it. This unit measures AC/DC Current Range up to 1000A and AC/DC Volt Range up to 600V and also measures continuity and frequency.