Meet the LIGHTSTORY Firefly LED speaker: a Bluetooth enabled device that supports up to 7 colors and connects to your smartphone from up to 33 feet away. It is compact enough for you to take it anywhere. The speaker has a 500 mAh battery that lasts up to 4 hours in max volume.
The LIGHTSTORY speaker is IPX4 waterproof. It has built-in microphone for calls. Costs under $20 at this time.