Key features * AC/DC voltage * USB data transfer * Low battery indication. * Data storage * LCD backlight * Polarization Index * Over-range alarm. * 9999 Max display * Comparative measurement * Measurement time selection. The UT516B is a digital high voltage insulation resistance tester with 6 ranges: 500V, 1000V, 2500V, 5000V, 10000V and 12000V. Test data can be saved in the tester memory and transferred to a PC via the dedicated USB cable, or be transferred to a PC in real time