CURRENT CLAMP, AC, 400A; AC Current Measuring Ranges:40 A, 400 A; AC Current Range Accuracy:± (2% + 10 digits); Battery Lifetime:300h; Current Measuring Range Resolution AC:0.01 A; External Depth:36mm; External Length / Height:190mm; Max Jaw Capacity:25.4mm; Safety Category:600V CAT III; Weight:280g; Width, External:64mm