USB2.0 Standard, Backward Compatible, According to RS485 Standard.

This is the newest revision of the FTDI Basic. There is a SMD 6-pin header on the bottom, which makes it smaller and more compact. Functionality has remained the same.

This is a basic breakout board for the FTDI FT232RL USB to serial IC. 

This Bi-directional Logic Level Converter is a small device that safely steps down 5V signals to 3.3V and steps up 3.3V to 5V at the same time.