Amazon is selling both the JLab Crasher and Crasher 2.0 BT speakers for $19.99. The list price is $79.99. These are great BT speakers for the money and have have exceptional battery life. They also have an output to charge your cell phone or a small tablet. You can daisy chain multiple Crasher 2.0 speakers to increase your sound and it is supposed to play louder than the Crasher.
The Crasher is available here [amazon.com]
The Crasher 2.0 is available here [amazon.com] DEAD