GearMo USB to 3.3v TTL DB9 Adapter The Cable provides a USB to TTL Serial interface with DB9 D-SUB connector. UART interface support for 7 or 8 data bits, 1 or 2 stop bits and odd / even / mark / space / no parity Utilizes newest FTDI FT232QR chip UHCI / OHCI / EHCI host controller compatible +3.3V output allows external logic to be powered from the USB port