Harman Kardon LifeBeam Vi Wireless Headphones Black.

Vi is the world’s first true A.I. personal trainer. Vi utilizes leading aerospace-grade biosensors, hi-fi sound quality, an elegant ergonomic design and the ability to learn and grow with each user.
Vi with Harman Kardon audio features:

AI engine for personalized fitness insights and plansAerospace-grade biosensors to such as heart rate, HRV, motion, elevation, environment and moreHigh-fidelity sound by Harman/KardonCustomized ear fittingsBattery power for a full day activity (~2 times more than most wireless earphones)

Win Every Run
Every run counts
Vi’s personal coaching gives you a sense of progress, every run.
Run with the community
Race virtually and get real-time updates for extra motivation.
Earn Achievements
Collect rewards as you become a more consistent runner.
The best running app for 2019″
Men’s Health