The Triplett MM870-NIST Digital Multimeter with Certificate of Traceability to NIST is a highly accurate, quick responding, TRMS meter for the Professional or DIYer. It measures AC/DC Voltage and Current, µA Current, Resistance, Temperature, Capacitance, Frequency (electronic & electrical), and Duty Cycle. True RMS provides better accuracy when measuring non-sinusoidal or noisy waveforms. Measurements are displayed on the backlit 6000/60,000 count LCD display with bargraph. It features LPF (low pass filter) for filtering frequency and harmonic interference when measuring variable frequency drives and Peak Hold (>1ms) with Min/Max. Min/Max/Average records the highest, lowest and average readings, Data Hold freezes measurement on the display and AutoHold updates it when a new stable reading is detected. Relative mode displays measurements relative to a stored reference value. The meter is waterproof (IP67), drop proof (6.5 feet/2 meters), and CAT IV 600V safety rated. Includes test leads, Type K temperature probe, (4) AAA batteries and Certificate of Traceability to NIST. 3-year warranty.