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Up to 50-hr Playtime Jam to Music All Day and Night. Necklace 4 provides an ultra long music-listening experience. Up to 50-hour playtime allows you to charge your Necklace 4 once a week. Charge 10 mins, Play 10 hours Charge as A Flash Just 10-min fast charging can provide 10-hr music listening, making you music play on and on. Noise Cancellation in Calls Designed for Clear Calls Necklace 4 is featured with proprietary noise-cancelling algorithm and inline microphone, which helps reducing surrounding noise and providing clear voice in calls. Magnetic Lock Intelligent Switch Each earbuds has a built-in magnet, allowing you to get away from tangle-free carrying, get easy storage, and make a intelligent switch.

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