Power Advantage E-00540-3 Dubs Headphone 2 Hybrid High Definition Headphones with 4 Speakers & Phone MIC Switch Cord, Red Converts from headphones to external speakers with the touch of a button Contains four (4) HD neodymium speakers with amplified sound Custom vented memory foam ear cups Fully adjustable for a custom fit Made for iPhone, iPad, iPod, and any mobile device with a speaker input jack