SINOBAND S100 12W The World's Lightest and Slimmest Portable Bluetooth Speaker (21mm, 9.9 Ounces), Ultra Portable Hi-fi Stereo System, Bluetooth 4.0 Technology, With FREE Quality Custom Made Pouch Carry Case, Powerful Battery Capacity Support 10hrs Playtime, Ultra-stylish Design & High-quality Precision-engineered Alloy Construction, Compatible with All Bluetooth Devices (Gunmetal Black)