... optional Compatible with TTL-232R-3V3 1. USB cable with 6 way 0.1" pitch single inline connector with +3.3V signalling.2. ... manufcturing sites and 300 works in Shenzhen, China. Main products are USB converter cables: usb to RS232, USB UART TTL 3.3v level ... . SP485, MAX3232, CM119, etc. These products are widely used in POS terminal applications, serial mouse, modem, router cotrolling, data acquisition ...