Features: brand new and high quality Support USB to R8485 communication. Adopt original FT232RL, high speed communication is stable, reliable and compatible. On-board TVS transient voltage suppression tube; can effectively suppress surge voltage and transient spike voltage in the circuit, lightning protection and anti-static. Onboard self-recovery fuse and protection diode ensure stable current and voltage output, prevent overcurrent and overvoltage, and improve impact resistance. External 3 L ED indicators for easy viewing of power and signal transmission and reception status. Specifications: Style: CH343G version, FT232RL version (optional) Communication speed: 300-921600ps, Host interface: USB Device interface: RS485 USB interface: Working level: 5V Interface form: USB-A type interface Interface protection: 200mA self-recovery fuse, ESD static protection. Transmission distance: about 5 meters RS485 interface: Interface form: terminal block Interface pins: A+, B-, GND Direction control: hardware automatically determines and controls data transmission direction Interface protection: Provide 600W lightning protection, surge and 15KV static protection (onboard 120R balance resistance). Transmission distance: about 1200 meters (at low speed) Transmission mode: up to 32 nodes in point pairs, more than 16 nodes are recommended to add repeaters), Indicator light: PWR: Power indicator, connected to USB, red light when detected voltage. TXD: Send indicator light, when the data is sent from the USB port, it lights up red. RXD: Receive indicator light, when the data is sent back from the device interface, it lights up red. Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 x USB to RS485 Converter