SMAKN-USB-20-to-Rs422rs485-Converter-Adapter-Serial-Win7-64-Mac-Pl2303
USB to RS485 / RS422 signal Converter. USB connection on one end, RS485 / RS422 selectable connection on the other end.
Features:
No external power supply needed.
Speed 230Kbps.
Supports USB 1.1 / 2.0