Ruby Electronics DT-9939 Waterproof Industrial Wireless USB RMS Multimeter with Capacitance Frequency Duty Cycle NEW!! 40,000 count high resolution LCD display (0.01 mV, 0.01 uA, 0.01 Ohm) ; Triple LCD display with bargraph & back light AC and DC measurement ; Memory for 9999 readings ; True RMS measurement and peak capture mode 1000V input protection on all ranges ; 4-20mA process loop measurements with % reading ; Data Hold /Max / Min recording mode IP67 waterproof and auto power off ; Wide capacitance range Wireless USB interface ; Optional software is included for FREE (Note: the software is included AS IS. No software development kit or support available).