USB to 4 Channels TTL 3.3V port for Simultaneous work. Support Windows 10/8/7/xp(64bit and 32bit), Linux 2.4 and greater and Mac OS 8/9, OS-X. Free-Driver on Raspberry Pi.
On-board USB High Speed((480Mbits/Second) IC FTDI FT4232H. TTL Transfer Data Rate up to 12M baud.
Onboard ESD protection for USB port and the build-in ESD protection for FT4232H IO.
On-board an external EEPROM, can be programmed over USB using FT_PROG tools, You can download this tools and usermanual from FTDI website.
All useful pins of FT4232H are reserved on board by pin header. It also can be used as a FT4232H development kits.