Our Bluetooth Headphones are built to last for up to 4 hours of use on a single charge. Built on the Bluetooth® 5.2 platform, allowing our Spire Wireless Earbuds to communicate as Bluetooth Low Energy devices, providing longer battery life for the listener and a stronger signal for better stability. The Magnetic charging case provides an additional 300 mAh of charging power to allow for a total usage time of up to 20 hours. One-Touch Media Controls provide total control of your Music, Videos and Media with the touch of a single button on the earbuds, left or right. We designed our Bluetooth Earbuds to be impervious to Rain and Sweat, so you can focus on your workout. Great for Running, Gym, Hiking, Biking, Workouts, Crossfit and yoga.