1x headphone Sound unit: 8mm Bluetooth compatible version: BT5.0 6. The earphones are rechargeable and can be used for about 3 hours when fully charged. 1. Mini in-ear wireless design，Super Mini Size and hidden in the ear, no wearing burden. Speaker sensitivity: 95dB 1kHZ Charging time: 50 minutes Frequency response range: 20Hz~20kHz Music playing time (50% volume): 3h Headphone weight (without packaging): 2.5g Product color: as shown 1x USB charging cable Battery capacity: 25mAh Receiving distance: 10m 4. You can control the earbuds by touching, and the Bluetooth V5.0 technology ensures durability. 3. This headset has a call function, you can answer calls easily and conveniently, and make your life interesting. 2.Ergonomic earphone design ensure the earphone is stable in ears, good for driving, sport, business and leisure. 5. This headset supports music playback, you can easily connect it to your mobile phone to provide you with clear stereo sound. USB: charging port Waterproof rating: IPX4 Microphone sensitivity: -38dBV/Pa Product model: F911 Headphones for Swimming Headphone Wi