USB to RS485/RS422 converter It easily lets you connect RS485 or RS422 device directly to your Laptop PC computer USB portRS485 Serial to USB adapter is ideal for industrial environment -provides 600w surge protection and 15KV ESD isolated protection on signal pins to protect costly and often sensitive control equipment against electrical damageUSB to RS485 cable adapter is with high performance quality processor chip (FTDI-chipset FT232) and I/O auto conversion circuitry which makes RS 485 to USB convertor one of the most reliable dongle on the market4ft USB serial RS-485 RS-422 adapter cable supports windows 11 10 8 7 Mac and more; plug-and-play No power supply neededThere are no IRQ and COM port conflicts since the port do not require any additional IRQ DMA memory as resources on the system; RS485 for Half duplex and RS422 for Full duplex communication