1) Auto sense serial signal rate, zero delay automatic transmit 2) 500Kbps the highest rate 1) Auto sense serial signal rate, zero delay automatic transmit2) 500Kbps the highest rate3) Supply three interface (RS232/485/422)4) Multi-mode 2km, signal-mode 20, 25, 40, 60, 100kmSpecifications:1) Standard: EIA RS-232, RS-48, RS-422 standard2) RS-232 signal: In, Out, GND3) RS-485 signal: D+, D-, GND4) ...