USB to RS232/RS485 Serial Converter, Adopts original FT232RNL chip, fast communicating, stable and reliable, better compatibility ^^ Onboard TVS (Transient Voltage Suppressor), effectively suppresses surge voltage and transient spike voltage in the circuit, lightningproof & anti-electrostatic ^^ Onboard self-recovery fuse and protection diodes, ensure the current/voltage stable outputs, provide over-current/over-voltage proof, improve shock proof performance ^^ Onboard RS232/RS485 communication switching circuit, configured by switch. Onboard 120R terminal resistor on the RS485 interface, enabled/disabled via switch. ^^ Multi system Support---Compatible with Mac/Linux/Android/Win11/10/ 8.1 /8/7, etc