Feature: *Use our digital voltage gauge to accurately measure voltage, 2 -line design, which is convenient for wiring and reverse connection protection. *No external power supply -use measurement voltage as a power supply. Measurement range: AC 70V-500V. *Bright and clear LED display panel for easy reading. The automatic movement display is convenient. *When there are a small amount of errors, the potentiometer on the circuit board is calibrated. *High measurement accuracy, good stability, and convenient installation. Meet most application requirements. Specification: Model: DSN-DVM-568ac Measurement range: AC70V-500V Power supply scope: No need to supply a power supply, directly use the test voltage as the power supply, the range is the same as above Maximum input: AC500V. (Note: The input voltage is higher than 500V and may be permanently damaged!) Allow error: 1%; Input impedance:> 1M Work current: red