It’s not quite a voice in your head, but KuaiFit Sport Headphones offer real-time smart voice coaching during your workout without the need to connect them to a smartphone.
The device now available in the U.S. serves as a wearable personal coach that monitors performance using biometric sensors, with the voices of athletes and trainers providing the feedback and motivation that’s automatically adapted to each user.
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Music can be played as well, as the headphones are equipped with an MP3 player.