Working Voltage:8-150V resolution 0.001V. Usually used to measure the charge and discharge capacity of RC lipo batteries. The measurable data includes the accumulated capacity WH and AH during long-term charging and discharging, real-time current I, real-time power W, and real-time voltage U. AH and WH not stop calculating due to power failure long press the reset button. It return to zero. This is a high- power meter, and its accuracy can even be used to calibrate a general multimeter. Test Current: -25A to 25A ,resolution 0.001A (50A in 3sec)., Weight: 0.1212542441 Pounds, Manufacturer: Taviko