CERRXIAN USB Male to RS485 RS232 Terminal Converter1. Power Supply: USB 5V 2. Transmission distance: up to 1200 meters (9600bps) 3. Lead PINS:A +, B-, GND ,GND,VCC 4. Communication protocol: pure hardware device, not limited by protocol 5. Baud rate: 921600bps, supporting mutual transmission support higher baud rate 6. Protection: TVS transient suppression protection, electrostatic ESD protection, surge protection, AB signal line short-circuiting and power short-circuiting protection (short-circuiting without burning) 7. Temperature range: -40?-80? 8. Provide 5V power supply with fuse current limit 9. Support system: support hot plug, support win98 / CE / 2000/2003/2008 / XP/Windows 7 / doing/WIN10 / VISTA/LINUX/MAC OS X.10.It is widely used in attendance machine, IC card charging system, industrial automation control system, card access control system, parking lot system, automatic banking system, bus charging system, canteen selling system, highway toll station system, etc.