CJMCU FT232H High Speed Multifunction USB to JTAG UART module PowerHD The Arduino Pro Mini also

The Arduino Pro Mini also works with the FTDI cable

Built-in self-test for quick diagnostics

Diameter: 28mm

Minimum Capacity: 1450 mAh

but its smaller and less expensive

CJMCU FT232H High Speed Multifunction USB to JTAG UART module PowerHD The Arduino Pro Mini alsoCJMCU FT232H is a single channel USB 2. 0 Hi Speed (480Mb s) to UART FIFO IC. It has the capability of being configured in a variety of industry standard serial or parallel interfaces. Feature: Single channel USB to serial parallel ports with a variety of configurations. Entire USB protocol handled on the chip. No USB specific firmware programming required. USB 2. 0 Hi Speed (480Mbits Second) and Full Speed (12Mbits Second) compatible. Multi Protocol