Nemesis True Wireless Earbuds with Hi-Fi quality sound are constructed with custom tuned 10 mm Neodymium Drivers to provide hours of listening enjoyment with balanced immersive sound. They were built on the Bluetooth 5.4 platform, allowing our Nemesis Wireless Earbuds to communicate as Bluetooth Low Energy devices, providing longer battery life for the listener and a stronger signal for better stability. With an extended 20-hour playtime, our wireless earbuds are built to last for up to five hours of use on a single charge. The charging case provides an additional 250 mAh of charging power to allow for a total usage time of up to 20 hours. Videos and media with the touch of a single button. Waterproof and sweatproof, 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, yoga and more.