It has a 4 Freescale chips:
A 32-bit Coldfire V1 microprocessor (big chip in upper right corner)
3-axis accelerometer (the same chip that is used in the Guitar Hero guitars) in very middle
Touch sensor
Battery charger for the rechargeable Li-ION battery


And has a tiny speaker (sounds like an old Nintendo game) and USB connection as well. Full software and schematics can be found at http://canyourbadgedothis.com and registering