The Extech MA220 is a versatile digital multimeter capable of measuring AC and DC current, voltage, resistance, capacitance, frequency, duty cycle, and contact surface temperature with a built-in Type K thermocouple. Its compact 0.9-inch (23mm) jaw can test conductors up to 300 MCM. Features include a 4000-count LCD display, data hold, auto zero, overload protection, overrange and low battery indicators, auto power-off, and CAT III 600V safety rating, making it ideal for professional electrical measurements and diagnostics.