Easy to use: The twin mode/single mode make you can use either of them as you like. You don’t need any skill to use the Bluetooth headphones. Once open the charging case, the wireless earbuds will pair with your device instantly. The bluetooth V5.0 make you getting 2x faster transmission speed + more stable connectivity with no signal loss or music dropouts. The range is up to 50ft away. | 40 Hours playing time: The earbuds provide 6 hours of playing time, with the charging case you can enjoy an additional 34 hours. USB-C fast charging technology allows you to get rid of the trouble of looking for charging cables of different specifications. The transfer speed is up to 10 gbps and charge fully in 90 minutes. Battery Indicator details battery level for charging. | IPX8 waterproof: Using Nano-coating technology to protect from sweat and rain in daily use. You can even clean the earbuds with water after a workout. | Comfort fit: The special ergonomic & lightweight design make it sit comfortably and stable in your ears. Please try the different sizes of ear tips to fit your ears. | Breathtaking music quality: The unique stereo sound quality and design gives you the perfect sound and deep resonant bass that you can feel the more realistic music. Once connected to your mobile phone, you can be placed in a music environment like CD.

Excellent Audio: apt-X HD audio combines with 10mm drivers deliver clear and smooth sound; By having high resolution audio technology, Boltune wireless headphones is with exceptional clarity & high fidelity, transmit Hi-Res Audio files, makes it possible to hear every small details in the music. | Crisp Voice Calls: Built-in microphone with advanced cVc 8.0 noise cancellation technology effectively blocks out noise, allowing you to take clear hands free calls on the go. Even in unpleasant noisy environments, you can enjoy a very clear call. | 3 Equalizer Modes: Adjust the intensity of your music with Bass, Normal and Treble modes to optimize your soundtracks, audio books, and more. A simple push of "Play ""+ "simultaneously activates the EQ settings feature getting your music more rhythmic and richer. | IPX7 Sweat and Waterproof: Fully waterproof build delivers serious defense against rain, sweat, and more; listen to music whilst running, hiking, and doing other exercises, protects the headphones from heavy rains or sweat fitness even in rainy days.(not recommend for swimming) | 16 Hours Playtime and Quick Charge: Bluetooth 5.0 technology combines with high-performing rechargeable batteries for up to an incredible 16 hours playback on a full charge. 5 minutes charge for using 2 hours! 12-month warranty promise and within 24 hours considerate after-service , no matter product problem, we will replace new one or refund for you.