SHARKK Portable Bluetooth Mini Speaker, Alloy Steel Rubber Finish Housing, Powerful Loud and Clear Sound with Bass. Reads Music From SD Cards And Has Built in Mic. Works With All iPhone, iPad, iTouch, Blackberry, Nexus, Samsung and all Phones and MP3 Players. Speaker System Has Built In Rechargeable (Bluetooth, Black) Advanced Bluetooth 3.0 ability allows you to play music from any device, even answer your calls with the built-in Bluetooth mic. Lithium Ion battery gives you 5 hours of continuous use on a single charge! Features increased volume range, crystal clear sound quality and powerful bass. Includes: USB Cable, 3.5mm AUX Cable, SD card slot and custom carrying bag. Specs: Frequency Response: 60Hz-18KHz. Output Power: 3.0W.