Testo 770-3 TRMS Clamp Meter Premium Kit – 0590 7703 03 Bluetooth Retractable Pincer Arm CAT IV 600V / CAT III 1000V The Testo 770-3 is the most advanced model in Testo's clamp meter range, combining True RMS measurement with a retractable pincer arm, Bluetooth connectivity to the Testo Smart App, and an extended set of measurement functions. It measures current up to 600A AC/DC via the clamp (with improved resolution in the lower current range), voltage up to 1000V AC and DC, resistance, capacitance, frequency, power, continuity, diode and temperature via an included Type K adapter. Like the 770-1, the retractable pincer arm folds back into the instrument body and then extends to clamp around individual cables in tightly packed consumer units and panels — reaching cables a fixed-jaw clamp can't get around. The Bluetooth link streams readin