... Max 40000 4.224*172*59mm 5.auto range I.Multi-Function Process CalibratorII.Brief Introduction1. Measure V, mA, Ω, frequency, temperature, 40000 ... source two functions, show and control in double display5. 32 function keys and numeric keys, setup and modify source value by ... % + 100.1% + 100.1% + 100.05Hz0.5Hz2Hz0.3% + 1°C Multi-Function Process Calibrator