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The Koostik iPhone speaker is a solid wood iPhone dock that naturally amplifies your iPhone speaker up to 4 times, without any wires or batteries. It uses the same sound principles as an acoustic guitar.
The Koostik works beautifully with any acoustic, jazz or instrumental music, giving the audio a new warmness thanks to natural wood.
Koostik speakers are hand made in the USA, and are compatible with all versions of the iPhone, including the new 5s.