Multifunctional Clamp Meter: can be used to measure AC/DC current, AC/DC voltage, resistance, capacitance, frequency, duty cycle, relative value, Max/Min value, continuity test, and diode test. Measuring Range: 400A AC/DC current, 600V AC/DC voltage, 40M? resistance, 40mF capacitance, 10Hz~10MHz frequency, and 0.1%~99% duty cycle. Data Hold & Max/Min: hold the measured data for conveniently checking or observing data. Backlight Function: 1.6-inch LCD screen with backlight ON/OFF switchable for display data clearly. Specifications Jaw Opening 28mm Resistance Range 400.0?/4.000k?/40.00k?/400.0k?/4.000M?/40.00M? DC Voltage Range 400.0mV/4.000V/40.00V/400.0V/600V Duty cycle range 0.1%~99% AC voltage range 4.000V/40.00V/400.0V/600V AC Current Resolution 0.01A/0.1A DC Current Range 40.00A/400.0A DC Current Resolution 0.01A/0.1A AC Voltage Resolution 0.001V/0.01V/0.1V/1V AC Voltage Frequency 10Hz~60kHz AC Voltage Frequency Resolution 0.01Hz~0.01kHz DC Voltage Resolution 0.1mV/0.001V/0.01V/0.1V/1V Resistance Resolution 0.1?/0.001k?/0.01k?/0.1k?/0.001M?/0.01M? Capacitance Range 40.00nF/400.0nF/4.000uF/40.00uF/400.0uF/4.000mF/40.00mF Capacitance Resolution 0.01nF/0.1nF/0.001uF/0.01uF/0.1uF/0.001mF/0.01mF Frequency Resolution 0.01Hz~0.01MHz Duty Cycle Resolution 0.1% Storage Temperature & Humidity -20~60"C, ? 80%RH Operating temperature 0~30?(humidity ? 80%RH), 30~40?(humidity ? 75%RH), 40~50?(humidity ? 45%RH) Display Count Max. 4000 Frequency range 10Hz~10MHz AC Current Range 40.00A/400.0A