Features: Strong anti-magnetic and anti-jamming function. Full function protection, anti high voltage circuit design. High voltage and short circuit input alarm. Large backlit LCD display, easy to read. Unit symbol display, easy to use. Accurate and reliable, wide test range. Insulation test voltages: DC 250V/500V/1000V, 750V AC Voltage. Package Includes: 1X Digital Insulation Resistance Tester Specifications: Material: Plastic Size: 176x116x63mm/ 6.9x4.6x2.5 in Special function VC60B+ Continuity alarm Less than 3010 Low battery indication Less than approx.7.5V Data hold LCD backlight Approx.10Sec. Function protection Input impedance 1M Sampling rate 3 times/Sec. AC frequency response 50-200Hz Operation mode Manual range Max.display 1999 note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.