General: This instrument is a battery powered insulation resistance tester that can be used to measure DC voltage, AC voltage, resistance, on-off, diode and insulation resistance. When measuring insulation resistance, there are four test voltages to choose from: 100V, 250V, 500V and 1000V. This instrument has polarity indication, over range indication, data retention, automatic retention and other functions. It is simple to use and is a precision measuring instrument. Multiple application demonstration Applicable to measuring insulation resistance of electrical equipment and insulating materials such as /motors/cables/switches/electrical appliances Function AC voltage:0V-750V DC voltage:0mV-1000V Capacitor 0nF-60mF Test voltage gear Display range Precision 100V 0.1~20M (3.0%+10d) 20~100M (4.0%+10d) 250V 0.1~20M (3.0%+10d) 20~200M (4.0%+10d) 500V 0.1~20M (3.0%+10d) 20~200M (4.0%+10d) 200~500M (5.0%+10d) 1000V 0.1~20M (3.0%+10d) 20~200M (4.0%+10d) 200~500M (5.0%+10d) 500~2000M (6.0%+10d) THE PARAMETERS ARE FOR REFERENCE ONLY,AND THE ACTUAL MEASUREMENT OF THE SPECIFIC EQUIPMENT SHALL Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Colour: Red Material: ABS Package Contents: 1 x Insulation resistance tester 1 x Pen line 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.