Quantity   Component name
1 × Teensy 3.1 The much beloved, insanely fast Arduino-compatible board from PJRC.com
1 × Teensy Audio Breakout Board Containing a mic-pre, uSD Slot, and 16bit 44khz I2S ADC, will provide all the recording and playback functionality
1 × Sparkfun RN-52 Breakout Board Provides easy, high quality bluetooth audio at 3.3v as well as 13 GPIOs!
1 × Adafruit TS2012 Class D Amplifier Capable of providing 1.7W and 24db of gain, this little amp is perfect for bringing speech level audio up to bone shaking volumes