The Fluke 437-II Power Quality & Energy Analyzer will capture power quality measurements for avionic and military power systems with 400HZ. It features a unified power function, energy loss calculator, power wave data capture and power inverter efficiency measurement capabilities. Meets the CAT IV 600V & CAT III 1000V safety ratings. It is Class-A compliant with a voltage accuracy of 0.1% of Vnom. The Fluke 437-II includes an 8GB SD card, test leads, current probes, a power adapter set, USB cable & hard case with rollers.