Bao Xin Special Designed Portable Mini Speaker for Tablet /Ebook/Kindle/Smart Phone, High Quality Surround Sound Enhancer ,Build-in USB Rechargeable Battery -Work With 3.5mm Audio Plug .Special Designed for iPad 1 2 3 4 air Mini Retina iPhone 4/4S/5/5S/5C Samsung Galaxy Tab Note Google Surface Nexus etc (Black) Build-in battery,no need for extra power supply.1-1.5 hrs charging time(Don't overcharge. !!!NO INDICATOR LIGHT WHILE CHARGING!!! ) 3-4 hrs working time Superb sound effect,double speaker offers high quality surround sound With this super mini cute speaker ,you will say good bye to low vioce while listen to mucical ,watch moive and playing games Made with gel,super soft and convenient.Just add it on your device easily 3.5 mm audio adapter,perfect for iPad 1 2 3 4 mini,Samsung Galaxy Note/Tab ,Google Nexus,Kindle and all kind of smart phone