Ver. Alpha Bluetooth Speaker Portable Wireless Hi-Fi with 3D Stereo Sound Enhanced Extra Bass Bluetooth 4.0 Built in Mic Hands-free Calling TF Card Slot & AUX for iPhone Samsung Mac PC

Very good battery life and the sound can be hight if you want.

This speaker is the best speaker ever. It's loud the bass is awesome . The sound is amazing, also stays charge for a long time.