Here is a wearable Android device that plays your Spotify music without a phone. Mighty can clip onto any piece of clothing and works with iOS and Android devices. It runs Android and offers WiFi/Bluetooth connectivity. The device is drop and sweat resistant.
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You are going to need a premium Spotify account to get started. The device has physical controls. Just sync it, and you are set. More information is available on Kickstarter.
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