ST181 Digital Clamp Meter 4000 Counts AC-DC Ammeter Voltage Tester Multimeter Car Amp Hz Capacitance NCV Ohm Test Features: Can measure AC and -DC voltage, AC current, resistance and test continuity. Manual select measurement function and range. Overload for protection for the whole measurement range. LCD display with backlight, convenient to operate and read. Data hold function, low battery indication, auto power off. Suitable for electrical equipment testing and maintenance. Specifications: Model:ST181 Display:4000 counts AC voltage: 4V/40V/400V/600V(1.5%+3) DC-voltage: 400mV/4V/40V/400V/600V(1.0%+3) Resistance: 400/4k/40 k/400k/4M omh(1.2%+3), 40M omh(1.5%+5) AC current: 40A/400A(2.5%+3) Frequency: 10Hz~400kHz(1.0%+5), 400kHz~4MHz(2.0%+5) Capacitance1nF~4uF(2.5%+10), 4uF~400uF(4.0%+20), 4mF(5.0%+30) Working temperature: 18C28C Package List: 1 * ST181 Clamp Meter 1 * Black Packing Bag 2 * Test Probes 1 * User Manual