Extech EX623 True RMS 400A AC/DC Clamp Meter with Dual Type K, InfraRed Thermometer and NCV Item is a Class II laser product, 1mW power output. True RMS measurements for accurate AC Voltage and Current Dual Type K thermocouple input for Differential Temperature function (T1-T2) Built-in non-contact Voltage detector with LED alert DC microAmp multimeter function for HVAC flame rod current measurements Data Hold plus fast Peak Hold of current surges during motor startup