Advanced Bluetooth 5.1 Technology and Quick Auto Pairing: These wireless earphones adopt the most advanced Bluetooth 5.1 technology to ensure more stable connection, low latance, low power consumption during data transmission with signal receiving range up to 20 meters. Just remove the bluetooth headphones from the charging case, they automatically connect with the last connected device, convenient and fast, without waiting.SUPERIOR SOUND QUALITY WITH MICROPHONE: Built-in 10mm bio-composite diaphragm drivers deliver finely tuned sound with exceptional clarity and no distortion. Noise-free bluetooth earphones, ambient noise cancellation with dual microphone to ensure that the phone is not obstructed, so that the other party can hear your voice clearly even in a noisy environment.Smart Touch and Wide Compatibility: Two separate in-ear headphones that can be connected wirelessly to form surround sound. In addition, the earplugs can be used separately. The smart touch design which does not need to press a button, is simpler and more sensitive. You can select the next last song, answer / reject the call or activate Siri, etc. When your device has Bluetooth, you can connect and use it.Ergonomic and waterproof design IP7: This wireless sports headset weighs only 3.8g with ergonomic design, so that you can feel comfortable for a long time, whether you are running or working . IP7 water and sweat resistant design can effectively prevent the running headphones from being damaged by sweat splash and raindrops.24-Hour Play Time & Type-C Fast Charging: In-ear headphones with a single charge give you 4 hours of listening time, while the charging case extends to 6 hours to keep going throughout the day . In just 1 to 2 hours, you can fully charge the case as it is equipped with a USB-C fast charging port. Wireless headsets turn off and charge on their own when you put them in the box. This allows you to stay anxiety free even when you are away from home or on vacation.