Fluke 333 Digital 400 Amp AC Clamp Meter400 Amp. AVG, 400A AC, 600V AC DC, Continuity. Auto shut off maximizes battery life so the meter works when you need it Small body and jaws fit perfectly in your hand and into tight places Improved low current measurement accuracy from new microprocessor technology Meter controls are positioned so current measurements can be done with one hand (index finger on clamp opening lever and thumb on rotary switch) Handy display hold keeps measurements on the