The AMPTEC 601ES Digital Multi-Meter is NASA and USAF range safety approved. Safely measures ACDC Voltage – 600 V RMS to 0.1 mV RMS, ACDC Current to 2.0 amperes, DC resistance 2.0 Ohms (0.1 milliohm resolution), 20 Ohms, 200 Ohms, 2.0 KOhms & 20 KOhms, Built-in self test signal sources and built-in analog milliammeter to verify DMMs stray voltage and current measurement integrity and more.