THE SINOMETER OEM, MADE BY UNI-TREND UT207 IS A PROFESSIONAL AUTO/MANUAL RANGE TRUE RMS AC/DC CLAMP METER, IT CAN BE USED TO MEASURE AC/DC VOLTAGE AND CURRENT. THIS CLAMP METER HAS INRUSH CURRENT MEASUREMENT, WHICH IS DESIGNED TO CAPTURE INRUSH CURRENT ACCURATELY AND SYNCHRONOUSLY AND PROVIDE READINGS THAT ACCURATELY DEPICT WHAT THE CIRCUIT PROTECTOR EXPERIENCES. ALSO YOU CAN USE IT TO MEASURE RESISTANCE, FREQUENCY, CONTINUITY TEST & DIODE CHECK. FOR YOUR CONVENIENCE, IT COMES WITH AN ABS PLASTIC CARRYING CASE. DC voltage: 6.6V / 66V / 600V AC voltage: 6.6V / 66V / 600V. DC current: 66A / 1000A. AC current: 66A / 1000A Resistance: 660W / 6.6kOhm / 66kOhm / 660kOhm / 6.6MOhm / 66MOhm Frequency: 660Hz / 6.6kHz / 66kHz / 660kHz / 6.6MHz / 66MHz Auto ranges, Diode test, Continuity of the circuit, True RMS Max / Min Mode, Data Hold, Sleep Mode, Backlight display, Low battery indicator, Power supply: 9V LCD Dimensions: 47 x 30 mm