... /three current. 2.Display:single current LED display/LCD display,three current LED display/LCD display. General Intelligent Transmitting ... 5,0.2 class, Frequency meter 0.1 class, Transmitting: 0.5 classDisplay4 digit LED display with sign bitInputNominal ... output, Load100kΩDigital valueRS-485 interface, MODBUS-RTU protocol, Baud rate default 9600(optional 4800,9600)bps digital frequency meter