Quantity   Component name
1 × MK20DX256VLH7 Cortex M4 used in the Teensy 3.1
1 × MINI54 Contains the magical bootloader built by Paul Stoffregen
1 × BC127 Bluetooth 4.0 module, also backwards compatible with bluetooth 2.1
1 × LSM303 3 Axis accelerometer and magnetometer
1 × Speaker & Microphone
1 × IR transmitter
1 × 220 x 220 round R61505V powered display
1 × 10 element touch ring Another benefit of the Cortex M4, built in touch hardware!
1 × 480mAh Battery
1 × Buzzer
1 × MicroSD slot and accompanying card