Sinoband Unique and Official S350 Portable Wireless Bluetooth CSR V4.0 Speaker 5W2 Speakers with DSP Technology Full Metal Enclosure Rechargeable Li-ion high capacity Battery for 10 hour playtime Powerful Strong Heavy Bass 3D Sound For Apple & Samsung mp3 or Mp4 players, phones, or tablets, Laptops PC Computers 3.5mm Audio Input Interface.(Silver) Latest Bluetooth CSR 4.0 Wireless Technology , Quickly pairing to your any bluetooth-enabled device, with the option to automatically reconnect to the last device used. Outstanding bluetooth range of up to 33-99 feet. Advanced 3D Surround Stereo Audio & Sound Performance Presents a whole new listening feast. Compact & Ergonomic full aluminum and metal grille high-end design and craftsmanship. Available with a canvas case. Built-in 2200mAh high-capacity rechargeable li-polymer battery provides up to 12 hours of playtime. Dual 5 Watt drivers deliver exceptionally impressive BASS that will move your heart and soul.