Adafruit 32u4 Feather Adalogger with microSD card reader, compatible with Arduino*
A small module with a microcontroller AVR Atmega 32u4 known from the Arduino Leonardo. Feather is designed for portable projects. On board is also a microUSB connector, through which the system can be programmed via the Arduino IDE environment. Slot for microSD memory card provides storage of large amounts of data.