Features

Support USB to RS485 bidirectional conversion
Fast communication, stable and reliable, better compatibility
Onboard TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, lightningproof & anti-electrostatic
Onboard resettable fuse and protection diodes, ensures the current/voltage stable outputs, provides over-current/over-voltage proof, improves shock resistance
3 LEDs for indicating the power and transceiver status

Package include
1. USB TO RS485 (B) x1
2. USB-A male to female cable x1
3. Screwdriver x1

Resources available: https://www.waveshare.com/wiki/USB_TO_RS485_(B)