Low latency, Fast and Stable Connection: Our Bluetooth 5.3 headphones can fast connection to previously paired devices after power on, low power consumption is enough to let you work out all day. Music and calls tend to have 0 latency, clearer sound, more stable calls, perfect audio and video synchronization. | Amazing Audio Experience: With the dynamic drivers, our wireless earbuds has a truly authentic sound and powerful bass. Also these running headphones are designed with noise-canceling microphone to better filter background noise and capture your voice even when answering calls while driving, biking and running. | Dual Waterproof Protection: With IPX7 waterproof rating and interior nano-coating technology, our workout headphones can effectively withstand sweat or rain, making wireless headphones functions well and safely during workout. | Up to 16 Hours Playtime: The rechargeable battery of Bluetooth earbuds supports up to 16 hours of playtime with just 2 hours of charging. Prolonging time meets your demands of continuous and enjoyable exercise. And it will show the remaining battery power of the headphones on your Phone screen. (Note: Please fully charge it by using the charging cable that comes with it for the first use) | Super Soft and Secure Fit: With a lightweight and ergonomic design, our sport headphones are a great combination of comfort and stability with ear-hook and in-ear fitting designed for strenuous workouts for outdoor or home. Comes with 4 sizes eartips (XS/S/M/L) to perfect fit your ear.