Replacement Charging Case: If you lose or damage headphones case of Air st & 2nd Generation. This charging case will be your high-quality replacement.The connection method is the same as . (Note: Earbuds are not included, only compatible with original headphones)Bluetooth Pairing: Our charging case comes equipped with a Bluetooth sync button that supports Bluetooth pairing. Your headphones will automatically connect when opened again.Fast Charging: Our charging case boasts fast charging capability, providing 1 hour of listening time in jt 5 minutes of charging. If your earbuds are completely out of , it only takes 30 minutes to fully . The charging case itself takes only 2.5 hours to After-sales Service: If you any issues, please do not hesitate to contact at , and we will do everything we can to solve the problem for you.Two Charging Options: This charging case supports both Lighting-cable charging and wireless charging.