The FLIR DM93 True RMS Industrial Multimeter with VFD Mode and Bluetooth world-class digital multimeter offers advanced variable frequency drive filtering to help you accurately analyze non-traditional sine waves and noisy signals. No matter what electrical challenge you're up against, the DM93's powerful lighting and durable design will make the job simple. The DM93 offers additional features including Bluetooth technology to connect a compatible smartphone for remote viewing and sharing, and METERLiNK technology, to wirelessly embed electrical readings into radiometric infrared images on compatible FLIR thermal cameras.