Boynq iCube II Speaker and Dock for iPod (Pink) Enhanced 5w x 2 Rms ful-range drivers includes 6 different size inserts to fit all sizes of iPod 3.5mm stereo line-in for iPod(R) shuffle & numerous other portable audio devices such as MP3 players, minidisc & CD players Line out for connection to home stereo with treble & bass control Freq range: 20 hz - 20 kHz Treble and bass controls for optimal sound tuning