Specification:
Model NO: SH-U08A
Standard : RS485/RS422
Main chip: WCH CH340
Interface: USB Type A ,5 PIN Terminal Block
RS485 PIN: TXD+(A+), TXD-(B-)
RS422 PIN: RxD+, RxD-, TxD+, TxD-, GND
USB 2.0; compatible USB 1.1
Baud rate: 300bps to 2Mbps
Compatibility: Windows 10,8,7

APPLICATION
LED display communication data; machine PLC data read, write, and PTZ control; Centralized control of household electrical appliances; access control systems; variety of industrial automation; instrumentation; employee attendance machine; highway toll station; ATM machine.

Bought these for controlling some remote cameras from my computer.  Thye worked well for the needed purpose.  These are leftover from the project.