Pyrus Electronics (TM) Powerful Super Micro Mini Portable Speaker for PC / Phone / Tablet / Apple iPod Touch / iPad / iPhone 4 / MP3 Player (Black) - 30123 Super Light Weight and Potable Speaker for all kinds of music players, phones, computers and tablets. Built in Rechargeable battery - up to 3 hours play back time per charge Built in Amplifier engineered to play powerful music with unbelievable small size Retractable 3.5 mm Audio cable for easy hook-up to computer, music player, iPhone, tablets and much more Beautiful compact design for maximized portability