Voltage range: 3*220/380V Current range: 100A Interface type: -485 communication interface Working power supply: When DC3.3V is powered, the voltage shall not exceed 3.6V; When DC5-24V is powered, the voltage shall not exceed 30V; Typical power consumption: Less than 20MA Data format: configurable, "n,8,1", "e,8,1", "o,8.1", "8,2"; default "n,8.1% Baud rate: configurable, 1200, 2400, 4800, 9600bps, the baud rate defaults to 9600bps Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use. Colour:As Shown Material:plastic Package Contents: 1 * power meter 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.