ARDUINO LEONARDO LIKE DEVELOPMENT BOARD FOR BREADBOARD FEATURES ATMEGA32U4 microcontroller, all in one USB communication, no need for an external FTDI chip. Input power supply taken from mini USB Feeds power to the breadboard bus Works on 3.3V UEXT connector which allows many existing modules like RF, ZIGBEE, GSM, GPS to be connected The LEDs and the BUTTONs are on the edge of the board so there is easy access even if the boards have shields on them A Mini USB connector is used, which is common and used in most cell phones, so you do not have to buy other cables