ft232 usb rs485 converter ft232+sp485 VCC/GND/A/B, shell VCC=5v, up ... and 300 works in Shenzhen, China. Main products are USB converter cables: usb to RS232, USB UART TTL 3.3v level ... , etc. These products are widely used in POS terminal applications, serial mouse, modem, router cotrolling, data acquisition and industrial automation applications ...