You name it, it will be there: - i2c level converter - i2c spi bridge - micro-sd card - full sized sd card - sd mp3 decoder - digital volume controller - separate amps for L & R - FM receiver - headphone jack / line in - micro usb port Still to add: - FM transmitter - bigass speakers - battery - charging circuits (in/out phone & separately) - physical control buttons - full sized usb slot - usb host (just for reading mp3s) - lightning connector