Here is a tiny speaker that can turn anything hollow into a speaker. The F8 is small enough to fit in the palm of your hand. It not only delivers rich sound but also has a cool RGB lighting effect. This bone conduction speaker can be used on your helmet, guitar, table, and other surfaces.
The F8 speaker measures only 31mm in diameter. It weighs under 50g and delivers sound up to 115db. It has 24 light beads that dance to the rhythm and volume of your music.[where to get it]