Polaroid Wireless Disco Speaker. PBT590BK. Bluetooth. Round. Black. Measures 5.75" tall and 2.5" in diameter. Features bright LEDs project a colorful mosaic on the wall and ceiling for a full sensory experience when in use. Charged up. (USB) Plug in the speaker in to charge after long periods of use and have it ready to go when you are. Lighting works even without music playing. Pair any Bluetooth enabled device to the speaker and wirelessly enjoy your favorite songs, podcasts, and more. Small but mighty. Despite its compact size, the Mini Lightshow Speaker packs quite the punch as it emits robust audio with full dynamic range.