IP67 True RMS Autoranging Cat IV DMM w/ Wireless USBA quality true RMS multimeter with a wireless USB computer interface, non contact voltage indicator, relative zero and data hold. Double moulded housing is impact resistant and quite durable, and IP67 waterproof rating makes this DMM capable of even the harshest conditions. Wireless USB interface and included logging software allow for computer based live data logging whilst keeping your computer completely isolated and protected.