Heart Rate Sensor

Accurate and Real-Time, Clinically-Validated Heart Rate Monitor.

Activity Tracker

Speed/Pace, Distance, Laps, Calories, Cadence & Duration.

8GB Memory

Store your workouts, plans, and over 2000 songs.

7h Battery

At least seven hours from a full charge. Go the Distance!

Voice Coaching

Adapted to your body using patented technology and accurate sensors.

No Phone Required

Exercise without needing multiple devices. Music and tracking in one!


Ideal for exercising indoors and outdoors. Rain, sweat ... no problem.

Bluetooth, BLE & ANT+

Connect to smartphones, smart watches, speed & cadence sensors, and more.

As featured on




Get accurate live feedback about your performance while listening to your music and getting trained by some of the world’s best athletes.


Hear your Heart Rate, Pace, Duration, Distance, Cadence, Steps, Laps, Calories.


Hear your Heart Rate, Speed, Cadence, Power, Duration, Distance, Calories.


Hear your Heart Rate, Calories, Pace, Duration.


Hear your Heart Rate, Speed/Pace, Cadence, Power, Duration, Distance, Calories.

how it works

Smart sport headphones that automatically measure your body and performance during any sport, providing adaptive real-time voice coaching.


Add 2000+ songs, store workouts and plans to the 8GB memory.


Sensors adapt to your body to provide customized coaching.


Train like never before and achieve your fitness goals.


KuaiFit becomes your wearable personal Coach. It automatically adapts training plans to your body using integrated sensors and smart software.

Get Connected

KuaiFit operates autonomously using its internal memory and microchip, but it can also connect to your smartphone, sport watch, bike sensor, bike computer, power meter, gym equipment, and practically any device with ANT+, Bluetooth, and BLE.

Access Your Data

Connect to your PC/Mac to upload music and training plans to your KuaiFit headphones. Visualize and share your sport data on your phone with the KuaiFit app, or at Kuai.Fit web. If you like using other sport apps, you can easily export your workout data saved in .FIT.

tech specs

The world's only multi-sport smart headphones that automatically measure your body and performance during any sport, using patented technology, accurate sensors, and proprietary software algorithms.

Hardware Features

Software Features





Heart Rate Sensor


Music Compatibility


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