Battery capacity: 701535/3.7V/350mAhCharging time: about 1.5 hoursProduct package: earphone * 1, instruction manual * 1, charging cable * 1True Open Ear HeadphonesWearable Stereo features a completely open-ear design that earbuds rest gently and securely on top of your ear.open ear headphones achieve the real nothing in your ear, compared with the in-ear headphones or bone conduction headphones.360 Superior SoundWith dual powerful 16.5mm dynamic drivers, which are three times the size of other earbuds,open ear bluetooth headphones create an audio experience thats more like an intimate concert setting. Adopt the top bio-diaphragm technology, our open headphones offers a rich and consistent listening experience at any volume, from crisp and clear highs to excitingly powerful lows.Complete Transparency Mode Earbuds Anti Hearing Loss open earbuds focused on and achieved avoiding the most common health issue of traditional earbuds as Oladance earbuds never actually go inside your ear. There is no pinching of the auricle, no blockage of the ear canal, and no pain or damage to hearing.Secure and Comfortable Fit, Sports Ready EarbudsEquipped with the multi-point support system that spreads the weight of the earbuds evenly across your ear,open ear headphones could perfectly fit the natural curve of your ear and avoid falling off. Feel comfortable wearing the open earbuds, whether you are sports, daily travel, meeting or working from home.Up to 16 Hours PlaytimeWith the 300 mAh large capacity batteryearbuds provide up to 16 hours of continuous playback per charge, or up to 12 hours of continuous calls, tested bylaboratory at 50% volume. When playing at 100% volume,supports up to 10 hours of continuous playback and calls. Actual playtime may vary depending on usage and environment.