Digital multimeter, durable & ergonomic impact resistant design manufactured to the latest industry standards, less than 3/4" thick, engineered with the ability to test ac/dc voltage, amperage, resistance, & continuity, improved audible & visual indicators, & a back lit display, designed with both an auto/off function to save battery life & a low battery indicator to ensure the user does not receive incorrect readings due to a low battery, unit utilizes auto ranging capabilities that allow the meter to determine the resolution based on the application selected without requiring manual range changes, capable of testing 600v ac/dc, measures ac/dc a: 10a, resistance: 200, 2k, 20k, 200k, 2m, 20m & ohm & continuity: audible, uses 2 "aaa" batteries, included.