The WINPEX VC903 Digital AC DC Clamp Meter is a versatile and powerful tool that can be used to measure a variety of electrical parameters, including AC and DC voltage, resistance, continuity, AC/DC current, frequency, duty cycle, diode, resistance, continuity, and transistors. It has a true RMS measurement function for accurate readings on distorted waveforms. It features a two-color backlit LCD display, large jaw opening, and a variety of other features that make it a valuable tool for electricians, technicians, hobbyists, and homeowners. Features of WINPEX VC903 Digital AC DC Clamp Meter: Measures AC and DC voltage, resistance, continuity, AC/DC current, frequency, duty cycle, diode, resistance, continuity, and transistors True RMS measurement for accurate readings on distorted waveforms Two-color backlit LCD display for easy viewing in any light condition Large jaw opening for easy clamping around thick wires and cables Data hold function for freezing readings on the screen Auto power off function to conserve battery life Low input impedance to prevent false readings from ghost voltage NCV Detection Function for non-contact voltage detection Two-wire display that shows AC voltage/current and frequency or Celsius and Fahrenheit on the screen Made of high-quality materials, it is durable, very practical, wear-resistant, and stable in performance It features hold result and max value buttons that makes it quicker and easier to use Specification of WINPEX VC903 Digital AC DC Clamp Meter: AC Voltage: 600V DC Voltage: 600V AC/DC Current: 600A Resistance: 60MΩ Frequency: 10Hz-10MHz Duty Cycle: 1-99% Diode Test: Yes Transistor Test: Yes NCV Detection: Yes Data Hold: Yes Auto Power Off: Yes Jaw Opening: 30mm Dimensions: 200mm x 80mm x 40mm Weight: 300g Power Supply: 2 x 1. 5V AAA Batteries (Not Included) Operating Temperature: 0-40°C Storage Temperature: -10-60°C Operating Humidity: <80% Storage Humidity: <70% Uses: Measuring electrical parameters in a variety of applications, including Electrical installations Appliance Repair Automotive electrical systems HVAC systems Audio/video equipment DIY projects