Fluke 1577 is an insulation multimeter tester which comes with 4 AA (NEDA 15A or IEC LR6) battery having a voltage of 500v 1000v. It has a digital LCD with backlight. This electric insulation tester has insulation resistance of 0.1M-600M. This product comes with a k-type thermocouple. It has a remote test probe having a hold lock type. Auto discharge is the main advantage of this insulation tester which saves battery. It can handle a current range of 0 to 400mA. The product is available in bulk order's. It gives a batter life of up to 1000 hrs. It has the most excellent quality, which assures durability and performance. The dimension of the product is 203x100x50 mm which weighs 624 g. While working with motors, generators or with any cable work, this product comes handy.