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Amazon.com: H2O Audio TRI Multi-Sport Waterproof Bone Conduction Headphones, Bluetooth Open Ear Headphones with Built-In MP3 Player -up to 6-Hour Battery Life, 8 GB -For Swimming, Running, Cycling, Hiking (Black) : Electronics
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MP3 Player Kit with OPEN-SMART Board Micro SD Card Touch Sensor Module MP3 module and speaker kit for Arduino
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