Here's a review of a wireless bluetooth speaker by the Adfilic company which costs less than $50 on Amazon.br br Find out about how the bluetooth speaker delivers excellent audio in this video. The sound test will prove that the speaker can deliver excellent audio in spite of its size. Hear the bass booster and subwoofer effect in action.br br The buttons of the speaker are also easily found on the top of the speaker. In this video, you will identify the best ways to run those buttons. Likewise, the video will show you where TF card slot, line-in port as well as the microUSB port are found.