The ZT-102 6000 counts pocket portable mini auto-ranging digital multi-meter tester a true RMS with 550V protection in resistance, capacitance, and frequency ranges. Feature a large LCD display with a maximum of 6000 counts. A sample rate of 3 times per second backlight. Other unique functions of data hold and polarity identification and low voltage indication. Measurement of the following AC/DC voltage, AC/DC current, resistance, capacitance, diode, and continuity testing, temperature, frequency and duty cycle. Has auto power off button, 10A high current and low current measurement.