Ailik Outbass II Bicycle Portable Rechargeable Wireless Bluetooth Speaker, Cycling Speaker Mp3 Player with Micro Sd Card and Aux Inputs, with 4 Interchangeable Colored Skins and Bike Mount, for Smart Phone and Tablet Enjoy perfect sound anywhere anytime! Play music via bluetooth, MicroSD card or AUX line! 7 hours(80% volume) working time, buit-in 820mAH rechargeable battery! Light and small very easy to install, new design add microphone f