Feature:1. USB to 4CH RS485: This industrial isolated adapter supports extending USB to 4CH RS485, which allows concurrent and independent communication for each channel.2. Onboard TVS: This USB to 4CH RS485 converter has onboard TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, lightningproof and anti static.3. Resettable Fuse: This USB to RS485 converter adopts onboard resettable fuse and protection diodes, ensures the current/voltage stable outputs, provides overcurrent and overvoltage protection, improves shock proof performance.4. 120R Resistors: This USB to RS485 converter adapter onboard RS485 output terminal 120R resistors, enabled and disabled via DIP switch.5. Aluminium Alloy: This USB to 4CH RS485 converter module adopts aluminium alloy case with dull polished surface, CNC process opening, strong and durable.Specification:Item Type: USB to 4CH RS485 ConverterMaterial: Aluminium AlloySupply Voltage: 5VWorking Current: 23.6mACommunication Rate: 1200bps to 460800bpsOperating Temperature: Minus 40 to Plus 85Operating System: Suitable for OS X Laptop, for Linux, for Win 11, 10, 8.1, 8, 7, for Android.Package List:1 xUSB to 4CH RS485 Converter1 x USB Cable