This is usb to rs485 module no isolation, if you need isolation module,please kindly check following link:
https://www.aliexpress.com/item/1005004337059295.html?spm=5261.ProductManageOnline.0.0.3d284edfIZLNTW
1. USB to RS485 CH340C 5V TI:SN74HC14 automatic flow direction control
Nanjing WCH CH340C+EXAR SP485 High speed: 921600bps
2. USB to RS485 CP2102 3.3V TI:SN74HC14 automatic flow direction control
Silicon CP2102+EXAR SP485 High speed: 921600bps
3. USB to RS485 FT232RL 5V TI:SN74HC14 automatic flow direction control
FT232RL+EXAR SP485 High speed: 921600bps