Sangean Portable Pillow Speaker for Use with any Radio, Radio Cassette, Clock Radio, CD Player or Other Equipment Fitted with a 3.5 mm Headphone Socket The Pillow Speaker is for Personal Listening This radio pillow speaker works with any device featuring a 3.5mm jack, such as CD players or MP3 player Auxiliary Input - A 3.5mm Aux-in socket allows you to Connect external devices like your iPod, iPhone, MP3 or CD player or other portable digital music players Built-In 5 inch Speaker - This advanced sound technology combines finely-tuned acoustic chambers and premium stereo drivers to deliver high-quality audio that you can truly appreciate An input adjustment switch helps you heighten the sound quality of the speaker