Walking 8,000 or 10,000 steps a day is not enough, walking these steps at an elevated heart rate is the key to an effective fat burn. Hera Leto helps you manage your power walk in that effective heart rate zone without over-exerting your heart. Hera Leto One earphone provides superior sound quality with award-winning design. More than just an earphone, Hera Leto One uses an ultra small sensor with PPG technology to track RR Interval to calculate the body’s stress index and display the dynamic heart rate. With no charging required, Hero Leto’s lightning plug makes pairing to Apple devices hassle free. To view user heart rate and stress level progress, simply download the Hera Leto app for free in the App Store. The app also gives access to the AI DJ (Artificial Intelligence). The smart DJ uses your bio stats to build your music library into playlists that help motivate you to achieve your goals, whether that is to increase heart rate or decrease stress levels. Tailored completely to each individual user, the Hera Leto earphone is a convenient tool for achieving long-term physical and mental health. All it takes is 15 minutes a day to begin investing in your health. Hera Leto One makes it easy to start even with a hectic schedule and other priorities.