【Replacement Charging Case for AirPods 4th Generation】This replacement charging case is designed for AirPods 4th generation (NOT compatible with 1st/2nd/3rd generation). It features USB-C charging. 【Bluetooth Pairing & Wireless and Wired Charging】The replacement AirPods 4th charging case supports Bluetooth pairing. Wireless and wired charging allows you to enjoy convenient and fast charging. 【Fast Charging and Large Capacity】The replacement wireless charging case supports AirPod 4 charging technology for fast charging in 15 minutes. The built-in 600mAh battery can be fully charged in 3 hours and can charge your Air Pod 4 up to 4 times. Easily maintain 24 hours of use. 【Protect Your AirPods】The charging case for AirPods 4 is equipped with a better smart chip to protect your earphones. This Air Pod 4 wireless charging case functions like the original and is easy to carry. You don't have to worry about damaging your earphones while charging.