Rubility Bluetooth Speakers, Bluetooth 4.1 Mini Wireless Speaker Stereo With Hollow Crack Colorful LED Light Portable Speaker Compatibility for Smartphone Grey. Hollow metal shell,gradually changing colorful lights,can be used as small night light by your bed, cool and mini;. Touchable button,one key for a variety of functions shift;. Support hands-free calls, up and down song, pause;. Support TF card;. The bottom with anti-skid pads.