[Insulation Resistance Test] This digital insulation resistance tester supports 3 different test voltage options (250, 500, and 1000V DC) for measuring insulation resistance ohms from 0.1M to 2G with 4% accuracy. Specific display of insulation resistance values, not just a range. [Multi-function Meter] Not just a megohmmeter, but also an electrical multimeter with a 1999-count display that measures AC voltages up to 750V with an accuracy of 1.0% and troubleshoots on-off faults with a buzzer. [Safe and Reliable] The handheld megohmmeter features high-voltage and short-circuit buzzer alarms and an anti-high-voltage circuit function, making it a reliable insulation measurement tool for testing the insulation of your heating cables and wiring, such as underfloor heating cables, thermostats and industrial generator windings. [DATA HOLD] This megohmmeter insulation tester has a sampling rate of about 3 times per second for fast and sensitive measurements. The data hold function freezes the current reading on the display for easy recording. Please note that the data hold function is during insulation resistance measurement. [Easy to Use] This digital megohmmeter is equipped with a 3.5-inch backlit high-definition LCD display and a data hold button, making it easy to read and record electrical measurements even in low-light conditions. Ideal field resistance tester for quick inspection of electrical components/motors. Power supply: 6xAA batteries (not included) Color: As Shown Material: plastic Package Contents: 1set x VC60B resistance tester 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.