1.Measure:single current/three current. 2.Display:single current LED display/LCD display,three current LED display/LCD display. General ... AC380V and etc.OverloadingContinuance: 1.2 times, Instantaneous: current 10 times(5s), Voltage 2 times(10s)Frequency50/60Hz ... gas, Height above sea level≤2500mOutputAnalog valueWhen DC4~20mA current output, Load100kΩDigital valueRS-485 interface, MODBUS-RTU protocol, ...