AICase TWS Wireless Headphones Bluetooth 5.0 Wireless Earbuds Built-in Mic Mini Sweatproof Sport Headsets in-Ear Headset with Wireless Charging Case Note 10+ or there are bubbles in

or there are bubbles in the middle

Also easy to use

Built-in metal aluminum base for great cooling effect

Input coupling: Direct current

AICase TWS Wireless Headphones Bluetooth 5.0 Wireless Earbuds Built-in Mic Mini Sweatproof Sport Headsets in-Ear Headset with Wireless Charging Case Note 10+ or there are bubbles inPortable Charging Dock and Longer Battery LifeThe charging dock with built in 1500 mAh battery, it could recharge the earbuds 5 times and it can be charged automatically once the earbuds is put in the charging case. The base is fully charged for about 1. 5 hours,allowing you to enjoy your music up to 1 2 hours,and 100 hours of standby time Else the charging case can act as a power bank for charging mobile phones and other USB devices. Effortless