Onkyo SBX-300 iOnly BASS Dock Music System iPod/iPhone/iPad Digital Audio Connection and Power Recharging Digital Amplifier Circuitry to Maintain Clean Audio Signals Active Bass Control, Super Bass Function 4 1/8" (10.5 cm) Full-Range Bass-Reflex Speakers COMPATIBLE iPod/iPhone/iPad MODELS- iPod touch (1st, 2nd, 3rd, and 4th Generation), iPod classic, iPod nano (2nd, 3rd, 4th, 5th, and 6th Generation), iPhone 4, iPhone 3GS, iPhone 3G, iPhone, iPad 2, iPad