Pi Quartet Waterproof Audio Power 25 Watt Wireless Bluetooth 4.0 Portable Speaker with Professional DSP and MaxBass Technology with 4400mAh Battery Power Bank with Micro SD Slot MP3 Playback Feature<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> ✔ Manufactured by Pi Electronics Inc. </span></li><li><span class="a-list-item"> ✔ Latest Bluetooth 4.0， Play music wirelessly from your phone， tablet， or computer by world-class chipset (Like CD Quality). IP67 Waterproof and portable design， makes your music everywhere from indoor &amp; outdoor， free from care of rain， dust， humidity tough environment， designation protects your investment with full advantages </span></li><li><span class="a-list-item"> ✔ Enjoy DSP and MAXXBASS Technology music bass enhancement ， makes music sound rich &amp; deep and real. Advanced Echo and noise cancellation HD MIC， makes your speakerphone calls ，sound loud &amp; clear during hand free conversation. </span></li><li><span class="a-list-item"> ✔ Build in music player function， playback all music format from Micro SD card. Giving you unbeatably convenient of using swappable memory cards for up to 32Gb music storage. Emergency Power bank function. +5V Power output to charge your phone or tablet. </span></li><li><span class="a-list-item"> ✔ 2X LONG PLAYBACK TIME of DSP SPEAKER， makes longer time to enjoy your high quality music with friends. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51i70LGayjL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51XKTxbUNyL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41iMdgwh7LL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51rGfJ1AVPL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51IcONC%2BQqL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41lGWS9IGNL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51IMtXMn1%2BL.jpg" noproxy>