... zero adjustment 2) 0.2%FS accuracy, RS485 ampere meter 3) CE, ISO certification 4 1/2 digital voltage meter & ampere ... measuring different signal, such as AC/DC voltage and current;3) With software menu and thumb switch to set High, Middle ... on PC, including measuring value, alarm hysteresis, transform rate, decimal point setting, communication address, baud rate, etc.8) Dimension: 48Hx96Wx100L mm. ...