The Klein Tools MM450 Auto-Ranging Slim Digital Multimeter has been designed specifically to meet the needs of electricians. This advanced TRMS multimeter measures voltage, current, resistance, temperature, capacitance, frequency, and duty-cycle, and is capable of testing diodes and continuity. Its slim profile makes it almost the size of a cell phone, and its reverse contrast display with optical sensor allows for clear reading in both dark and bright environments. The MM450 is equipped with quality Klein Tools leads for consistent results.