This is an economy range general purpose 3 ½ digit AC Clamp meter with backlit LCD display. The jaw opening is 50mm approx. & can measure AC current through the clamp upto 1000A. It also measures DC Voltage -1000V, AC Voltage-700V, and Resistance up to 2 MΩ Frequency -20 MHz with continuity & diode measurements. This meter also has a Max button which is used for Inrush Current measurement & meter is powered by 9V Battery.