Loud and Powerful‎!‎ The Naztech Mini Boom Speaker is the perfect portable speaker system for your iPod‎,‎ iPhone‎,‎ smartphone‎,‎ MP3 player or any laptop‎.‎ What makes this speaker unique is the SD card slot that allows you to play all of your favorite music files at anytime‎,‎ anywhere‎.‎ Enjoy Loud and Powerful music on the go‎!‎ Features‎:‎ Micro SD Reader / Player Built‎-in Li‎-ion Battery High Quality Amplified Sound Connects to any 3.5mm Audio Device Specifications‎:‎ Music Formats‎:‎ WMA / MP3 Speaker Output‎:‎ 2W Auxiliary Jack‎:‎ 3.5mm Battery Charge Time‎:‎ 4 hours Frequency Response‎:‎ 80 Hz ‎- 18kHz Lithium‎-ion Battery‎:‎ 3.7 V Cables & Etc‎,‎ LLC is the owner of the trademark C&E‎.‎ This UPC is trademarked under C&E‎.‎ Any violation will be reported to Amazon without any prior warning‎.‎