Item Type:USB2.0 to RS485 Adapter Standard:USB2.0,Compatible with RS485 Standard USB Signal:VCC DATA+ RS485 Signal: T/R+ T/R- GND Working Mode: Asynchronous Work, Point-to-Point or Multi-Point, 2-Wire Half-Duplex Baud Rate: 300-9216000BPS, automatic detection of serial signal rate. Transmission Distance: 1.2km on the RS485 terminal, and the USB cable does not exceed 5M. Interface Protection: Surge 600W protection power, ±15KV static protection. Interface Form: USB-type A-type interface male, DB9 male connector connection. Transmission Rate: 621600BPS to 300M, 38400BPS to 600M, 9600BPS to 1. 2KM Transmission Medium: Twisted pair or shielded cable Total Length:1.5m / 4.92ft Head Size:5.5cm / 2.17in Working Environment:-25~70℃, 5~95%RH Fit for Windows 98/ME/2000/XP/VISTA/7LINX WINCE 1、No external power supply, more convenient to use. 2、Unique I/O circuit automatically controls data flow direction without any handshake signal, plug and play. 3、Interface converters provide reliable connectivity for point-to-point, point-to-multipoint communications. 4、Automatically identify and control data transmission direction by using data flow automatic control technology. 5、Support point-to-multipoint, each converter allows the connection of 32 RS485 interface devices. 1 x Adapter 1 x Module 1 x Optical Disc