Multi Function Automotive Tester DM9131 automotive tester features: LCD with green light backlight, easy reading. 6000 counts A/D, high resolution. Multi function measurement. DCV, ACV, DCA, ACA, Resistance, Capacitance, Inductance, Frequency, Temperature, Diode, Continuity beeper, TACH, DWELL, POINT, 2000A Clamp Max. & Min. measurement value with recall. Relative, Data hold. Auto range with manual range selection. Temperature measurement possibility. V/A/Hz button, when execute the ACV, ACA function also can measure the frequency of signal. Both 10 A, 6A current are build fuse for safety consideration. 10 M ohm impedance for voltage circuit. Operates from 9V ( 006P, MIN1604 ) batteries. Built-in overload protection for most ranges. Photo couple RS 232 computer serial interface. Uses durable, long-lasting components, enclosed in strong, light weight ABS-plastic housing. Replaces discontinued model DM9030