Function: 1. AC and measurement; 2. Insulation resistance measurement; 3. 100 groups of data storage; 4. Automatic calculation of polarization , absorption ; 5. Backlight and data retention function; Specification: Size: 172.7 x 140.3 x 62.3mm / 6.8 x 5.5 x 2.5in Power supply: 8*AA batteries (not included) Maximum display: 2000 counts Measuring range: 1. Measure the output voltage MH12: 50V-1000V, (50V, 100V, 250V, 500V, 1000V,). 2. Measure insulation resistance: MH12: 0.1MΩ-10GΩ. Absorption and polarization standard Absorption : The of the insulation resistance value at 1 to the insulation resistance value at . Polarization PI: The of the insulation resistance value at 10 minutes to the insulation resistance value at 1 , to whether the equipment has affected the insulation resistance due to moisture Insulating materials all have the absorption process and polarization process of charge after adding high voltage. The requires that the polarization should be measured in the insulation test of the main transformer, cable, motor, etc., and this data can be used to the quality of the insulation, quality and aging problems. Material: ABS colour: Red+black Package Contents: 1 x Digital Megohmmeter 1 x english manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.