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Set your music free anytime, anywhere with this ingenious metal smartphone speaker, no battery or electricity required. Simply put in your smartphone and let the amplified sound waves spread your favorite tunes to the four corners of the room. Made with vibration-resistant Duralumin and designed using the golden ratio,

Save on Battery-free Amplifying iSpeakers with a Yanko Design Select promo code

Checkmate is a savings app with over one million users that have saved $$$ on brands like Yanko Design Select.

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