Features: The physical layer adopts UART to RS485 communication interface, with baud rate of 9,600, 8-bit data bits, 1-bit stop bits and no verification This Multi-function Meter can measure voltage, current, power, power, frequency, power factor Over power alarm: Active power threshold can be set, when the measured active power exceeds the threshold, it can alarm It can display six measurement parameters on the computer when communicate through the software The high test accuracy, better compatibility will make it use widely. Specifications: Brand: PEACEFAIR Type: with USB to RS485, with no USB to RS485 (Optional) Voltage Measuring range:80~260V Resolution: 0.1V Measurement accuracy: 0.5% Current Measuring range: 0~10A Starting measure current: 0.01A Resolution: 0.001A Measurement accuracy: 0.5% Active power Measuring range: 0~2.3kW Starting measure power: 0.4W Resolution: 0.1W Display format: When the data is ＜1000W, it display one decimal, such as: 999.9W When the data is ≥1000W, it display only integer, such as: 1000W Measurement accuracy: 0.5% Power factor Measuring range: 0.00~1.00 Resolution: 0.01 Measurement accuracy: 1% Frequency Measuring range: 45Hz~65Hz Resolution: 0.1Hz Measurement accuracy: 0.5% Active energy Measuring range: 0~9999.99kWh Resolution: 1Wh Measurement accuracy: 0.5% Display format: When the data is ＜10kWh, the display unit is Wh(1kWh=1000Wh), such as: 9999Wh When the data is ≥10kWh, the display unit is kWh, such as: 9999.99kWh Reset energy: use software to reset. Communication interface: RS485 interface Size: 90 x 60.5mm / 3.54 x 2.38in Weight: 90g Package includes: 1 x Multi-function Meter 1 x USB to RS485 (Optional) 1、The physical layer adopts UART to RS485 communication interface, with baud rate of 9,600, 8-bit data bits, 1-bit stop bits and no verification 2、This Multi-function Meter can measure voltage, current, power, power, frequency, power factor 3、Over power alarm: Active power threshold can be set, when the measured active power exceeds the threshold, it can alarm 4、The high accuracy, better compatibility will make it use widely. 5、The high test accuracy, better compatibility will make it use widely.