The TTL-232R-3V3 is a USB to Serial (TTL level) converter cable which allows for a simple way to connect TTL interface units to USB.
This version of FTDI's USB to TTL serial adapter cables has it's I/O pins configured to operate at 3.3V levels.
The TTL-232R-3V3 uses a FT232RL IC which is housed inside the USB ‘A' connector, and is terminated at the end of a 1.8 meter cable with a 0.1″” pitch header socket which provided access to transmit (Tx), receive (Rx), RTS#, and CTS#. These lines all operate at 3.3V levels. Also brought out on the header are Vcc (5V), and GND.
Operating system support
Drivers are available to download as follow:
http://www.ftdichip.com/Drivers/VCP.htm
which allow FTDI devices to work with the following operating systems:
Windows 10 32,64-bit
Windows 8/8.1 32,64-bit
Windows 7 32,64-bit
Windows Vista and Vista 64-bit Windows XP and XP 64-bit Windows 98, 98SE, ME, 2000, Server 2003, XP,
Server 2008 and server 2012 R2
Windows XP Embedded
Windows CE 4.2, 5.0 and 6.0
Mac OS 8/9, OS-X
Linux 2.4 and greater
Android (J2xx)

Installation Guides
If you need further support about how to pick up and install drivers, please goes to
http://www.ftdichip.com/Support/Documents/InstallGuides.htm

Package:
1 X USB to 3.3V TTL UART 6Pin Termintored Cable