The speaker consists of a piece of bamboo, open on both ends and machined in a way that allows you to place it on a flat surface and insert your iPhone 4/4S and iPhone 5, iPhone6/6S, iPhone7, iPhone8, iPhone10X at the top. The natural resonance of the hollow bamboo speaker body amplifies sound. This unique property makes bamboo an ideal material for making an all-natural, no-power-needed iPhone amplifier.
