FLIR CM83 Power Clamp Meter 600A with VFD and Bluetooth VFD Mode provides superior accuracy for working on VFD-controlled equipment Advanced power efficiency and harmonics measuremenets for system level performance analysis Powerful Worklights no only assist with clamping but are bright enough to serve as a primary worklight FLIR Tools Mobile connects the FLIR CM83 to your compatible smartphone and table via Bluetooth METERLiNK technology wirelessly integrates electrical readings on your infrared image with FLIR Thermal Cameras