The Fluke 709 mA loop calibrator is designed to reduce the time it takes to measure or source voltage or current and power up a loop and still produce high-quality results. The Fluke 709 is built around a user friendly interface with a quick-set rotary encoder knob and best in class accuracy at 0.01% of reading. It features a protective holster that fits easily in a technician's hand and a large backlit display that is easy to read, even in dark, cramped work areas. So it's a great choice anywhere you need a compact, rich featured precision loop calibrator.