The ‘lilypad’ form factor allows easy building of sewable electronics and e-textile projects. Can be used with Z 6368 LED sequins. The ATMega 32U4 is an 8-bit AVR microcontroller featuring 32KB self-programming flash program memory and a 12-channel 10-bit A/D-converter. On board micro USB for 5V power with JST for connection to lithium battery (charging switch provided). 50mmØ.