1 、 DB9-S/P space saving connector
2 、 RS-232C data interface fully compatible with PC
3 、 DB9 connector and 4-bit terminal are optional to RS-485 interface
4 、 Automatic direction control of transmitting data (TXD),
　　 zero-latency time design
5 、 Working mode: asynchronous half or full duplex
6 、 High efficiency serial port electricity stealing technology,
　　 no need external power supply
7 、 real three line (TD, RD, GND) mode communication
8 、 Communication speed: 0-115.2KBPS
9 、 Transmission distance: 0-1200 meter