Ergonomic design: The Bluetooth earplugs have a comfortable in ear design, which is not painful to wear for a long time and is very enjoyable to wear. The waterproof performance reaches IPX7, and it is waterproof and not afraid of sweating. Very suitable for cycling, fitness, running, jogging, fitness, and more. 100H playback time : Our stereo Bluetooth earphones have a high capacity battery, allowing you to listen for 100 hours. Using Type-C interface for charging, it has wide compatibility and is compatible with mainstream smartphones.Portable and Connected Dual Mode: No tangled wires, easy to store in a sports arm strap or bag. Adopting new Bluetooth 5.2 technology : Smooth transmission without lag, low power consumption, wide compatibility, even on crowded subways, the signal will not be cut off. Provide stereo sound and top-notch high and low volume. Excellent wireless earplug sound effects. Built in microphone with incoming voice notification.Call Noise Reduction: The headphones use a noise cancelling microphone, which will make the sound clearer when making calls as outdoor noise decreases. You can enjoy high-quality hands-free calls on the street and use them with all Bluetooth enabled phones.Risk-Free ShoppingWe offer free returns for any reason. If there is a quality issue, we will replace the product for free. Your satisfaction is our top priority.