Industrial communication module: our product uses an industrial USB to RS485 communication module. Serial two-way communication half-duplex interface. Industrial CH340 chip that automatically detects and controls the direction of data transmission without handshake signals (such as RTS,DTR etc). The mode transition can be achieved without jumper settings, which ensures compliance with the existing Communication software and cutting place hardware. Working voltage: DC 5V. Communication distance: 1200 meters (max.9600 bit/s). Supported operating systems: XP/WIN7/WIN8/WIN10/VISTA/LINUX/Mac OS X The computer cannot recognize our CH340 converter without the driver. You need to download the CH340 driver software. If you do not have a suitable driver, just contact us, we will provide it. Wide range of applications: it is often used in data acquisition, signal conversion, repair of devices and product development. Parameters: Working Voltage:DC 5V Communication distance: 1200 meters (maximum 9600 bps). Baud Rate:115200bps (Max. ). Working Temperature: -40~80 Working Humidity:0%~95%RH Module size 70 x 27 x 13mm