Automatically switches between ACV, DCV, and ohms (resistance). Benefit: Simple to use. Meter selects function and range, just connect the leads to the device under test. Single button operation. Benefit: Easy to use. Enables users with limited knowledge to perform tests safely. 0 to 600 volts AC and DC. Benefit: Enough range to safely perform measurements. 10 M? internal impedance. Benefit: High impedance prevents inaccurate reading caused by circuit loading.