1.   USB 2.0;compliable USB 1.1,1.0;TIA/EIA RS-485、RS-422
2.   USB Signals： VCC、DATA+、DATA-、GND、FG
3.   RS-485 Signals：T/R+、T/R-、GND
4.   RS-422 Signals：TXD+、TXD-、RXD+、RXD-、GND
5.   Working mode: Asynchronous,P2P,Point to multipoint, 2 lines half duplex,4 lines all duplex.
6.   Directional control: Automatically determine and control the data transmission direction.
7.   Baud rate：300-921,600bps, Automatically adapt serial port signal speed.
8.   Load capacity: Point to multipoint, Max=32 RS-422 or RS-485 interface devices
9.   Transmission distance: RS-485/422 port 1.2KM(at 9,600bps),USB< 5 meters
10.  Interface protection: 600W lightning strike, surge protection and ±15KV ESD protection
11.  Interface types: USB port A-class males, and RS-485/422 port 5Pin posts
12.  Signal indicators: PWR,TXD,RXD
13.  Transmission medium: STP,UTP
15.  Environment: -40℃-85℃, relative humidity 5%-95%
16.  Support : Windows95/98/2000/xp/Vista、IMAG