Features: USB to RS485 Converter Adapter USB connector: to your PC RS485 connector: to your RS485 device No need external power, powered by USB port Fully compliant USB 2.0 standard , backward compatible with USB1.1 Applications: All kinds with RS485 port device parameter settings , data communication Short distance , such as parameter settings of the computer peripheral equipment , the use of common data lines can be . A and A port of the device when the wiring is connected , B and device B connected . Some devices D + A and D, - B . ? LED display of communication data ? Machine PLC data reading and writing ? Monitoring data read and write , and PTZ control ? Centralized control of household electrical appliances ? Access Control System ; card ? A variety of industrial automation ; instrumentation ? Parking ; bus fees ? Dining Hall ; staff attendance ? Highway toll station; ATM machine Specification: Dimension:6.0 x1.8x1.4cm Color: Black Net weight: 8g Packaging weight: 18g Support System: Windows XP , Vista, Windows 7 , Linux , MacOS , and WinCE5.0 drive Supports baud rate range : 75bps - 115200bps , up to 6Mbps Supports Plug , Play and hot-swap ( USB side) ; Better than using CH341D chip or similar chip to support the laptop USB port . Communication distance up to 1.2KM, with anti-jamming performance of industrial site ; Work temperature range: -40C ~ +85C Communication distance :1200m(max) Package Content: USB to RS485 Converter * 1pc