... 10 ~ 70 ºC ±1.5 ºC ***Special Functions: ♦ USB Interface♦ Measurement of Insulation Resistance for HP Devices (Transformer, Electric ... )♦ Stepped Voltage Test(25v step setting)♦ Temperature Compensation♦ Auto Computation and Display of PI (Polarization Index) and DAR ... 6,Data analysis Software , Temp. sensor, Tester probes , USB cable ,User Manual, Gift Box♦ Optional Accessories: rechargeable battery, ...