This is a great little speaker. It supports multiple formats (bluetooth, Micro-SD, USB, AUX inputs). It might possibly be used as a portable PA system by adding a bluetooth microphone. It includes a multi-colored LED light show. It is powered by a built-in rechargeable battery pack and recharged by a USB power source (computer, wall adapter, etc) using the included charging cable. The sound quality is incredible.
This is one of our granddaughter's birthday presents, so don't say anything (SHHHH)