Fluke® iFlex® Wireless Clamp Meter Module, 2500 VAC, 0.5 to 2500 A, 2.4 GHz ISM RF Communications, 3.5 to 20 m RF Communication, LCD with Back Light Display, True RMS Flexible Current Meter/iFlex® i2500-10 Flexible Current Probe Contents, -10 to 50 deg C, AA Alkaline Battery, Memory: 65000 Readings, Safety Rating: CAT III 1000 VAC/CAT IV 600 VAC, IP42 Ingress Protection, 0.1 A Resolution, 3% +/-5 Digits (5 to 500 Hz) Accuracy, 3 at 1100 A Crest Factor, 2.5 in W x 1.4 in D x 6.5 in H Dimensions, 10 in Jaw Opening