The Extech EX840 CAT IV True RMS clamp meter features a built-in IR thermometer with laser pointer for non-contact surface measurements from -58 to 518 degree Fahrenheit (-50 to 270 degree Celsius). Clamp measures AC current up to 1000 Amp with a maximum resolution of 0.1 Amp. The 1.7 in. jaw fits around conductors up to 750MCM. Peak hold captures motor inrush currents and other surges. Data hold and auto power off functions. Other functions include AC/DC Voltage, resistance, Type K thermometer, capacitance and frequency.