Bộ chuyển đổi USB sang 4 cổng RS-232 ICP DAS USB-2514 CR
USB-2514 is USB to 4-Port RS-232 converter that provides a simple way add up to four RS-232 ports on your PC. The USB-2514 is support USB 1.1, USB 2.0 standards and easy setting RS-232 transmission speed from 300 bps to 921600 bps.