Meet the Kuai: waterproof sport headphones with a heart rate sensor, accelerometer, 8 GB of memory, and smart coaching. It measures your speed, cadence, strokes, calories, and VO2max. You get training plans for running, swimming, and cycling.
You may also want to see:
The device has up to 7 hours of battery life. It works autonomously or with your ANT+ / Bluetooth devices.
**Disclaimer: Our posts may feature aff links. As an Amazon Associate, we earn from qualifying purchases. Please read our disclaimer on how we fund this site.
