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 Converter Material: Aluminium Alloy Supply Voltage: 5V Working Current: 23.6mA Communication Rate: 1200bps to 460800bps Operating Temperature: Minus 40℃ to Plus 85℃ Operating System: Suitable for OS X Laptop, for Linux, for Win 11, 10, 8.1, 8, 7, for Android. Package List: 1 x USB to 4CH RS485 Converter1 x USB Cable