The DL599 is an award-winning wireless True-RMS HVAC/R clamp meter with preventative motor testing. Offering full HVAC functionality including advanced features like DC Amps, LRA Inrush, differential temperature and wireless connection to a free App for logging, graphing and emailing results. Motor diagnostics includes 3-phase motor rotation test, unbalanced current and voltage test to determine a motor s load efficiency, Low Z (impedance) to improve accuracy by reducing ghost voltages, and a Low Pass Filter to screen out unwanted higher frequencies from Variable Frequency Drives. Included are CATIV rated silicone test leads, back probe leads for mini-split applications, a pair of alligator clips, two thermocouples, a zippered pouch, and backed by a 2-Year warranty.