Features: Effortlessly switches between USB to RS485 and USB to RS232 communication via atoggle switches, powered by the advances CH343G chip for plugs and play compatibility across systems. Builts with TVS surges protections, selfs recovery fuses, and double statuses LEDs to ensures stable voltages/current output while monitoring power and data transmission in real time. for industrial automation engineers, embedded systems developers, and enthusiasts requiring serials communication interfaces for device connectivity. Perfect for industrial controls panels, laboratory equipment debugging, or legace device upgrades in environments demanding ESDs and surges protections. This USB to serials adapter combines industrial durability with intuitives operations, featuring triple layer circuit protections to withstand harsh electrical conditions.<br/ Specifications: Product Type: Industrial USB to RS485/232 converter Communication rate: 50bps~100000bps Host interfaces: USB Color: Blue, Black(optioinal) Device interfaces: RS485/RS232 (switched through the dials switches) USB port: Working levels: 5V interfaces form: USB-A type interfaces interfaces protections: 200MA selfs-recovery fuses, ESDs electrostatic protections Transmission distance: about 5meters Package Includes: 1PC USB To RS485 RS232 Converter Module note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.