The Mastech MS8217 Digital Multimeter 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, transistors, and non-contact voltage. It features a large backlit LCD display, data hold function, auto power-off function, and a variety of other features that make it a valuable tool for electricians, technicians, hobbyists, and homeowners. Features of Mastech MS8217 Digital Multimeter: Measures AC/DC voltage, AC/DC current, resistance, capacitance, frequency, duty cycle, diode, resistance, continuity, transistors, and non-contact voltage True RMS measurement for accurate readings on distorted waveforms Large backlit LCD display for easy viewing in any light condition 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 Built-in K-type thermocouple for temperature measurement Specification of Mastech MS8217 Digital Multimeter: AC voltage: 600V DC voltage: 1000V AC and DC current: 400A Resistance: 60MΩ Capacitance: 50nF to 100µF Frequency: 10Hz to 10MHz Duty cycle: 1 to 99% Diode test: Yes Transistor test: Yes NCV detection: Yes Data hold: Yes Auto power off: Yes Jaw opening: 25mm Dimensions: 185mm x 87mm x 53mm Weight: 300g Power supply: 3 x 1.5V AAA batteries (not included) Operating temperature: 0 to 40°C Storage temperature: -10 to 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 Temperature measurement