Monoprice Portable Melody Bluetooth Speaker SOUND QUALITY - Life is too short for speakers that don't sound great! We believe that the whole point of listening to music is to hear it as the artist intended. Our engineers and audio experts have spent countless hours listening to and comparing various speakers and headphones until we were satisfied we had found models that fit our demanding standards. COMPACT SIZE - This portable speaker easily fits in any purse or backpack, so there is no excuse for not enjoying great sound everywhere at any time. The well-balanced, solid construction ensures that it can withstand the hard use that goes with using portable products. LISTEN LONGER - We packed a massive 1200mAh rechargeable battery into this small speaker, so you can enjoy you music or take phone calls for up to 10 continuous hours on a single charge. You can use the included Micro USB charging cable to plug into any USB power source for charging or continuous power, allowing you to rock out all night long. BUILT IN MICROPHONE - allows you to make and receive phone calls or even use it for video conferencing. The Bluetooth v4.0 radio provides full support for the HSP, HFP, A2DP, and AVRCP profiles, allowing you to control playback as well as the phone for calls. 3.5mm STEREO LINE INPUT - allows you to use this speaker with non-Bluetooth devices and the large 1800mAh battery provides up to 15 hours of playback, allowing you to party until the break of dawn.