QCY T12 Semi In-ear TWS Earbuds Updated Version: 1.13mm driver: in the limited semi-in-ear acoustic cavity structure, a 13mm large speaker unit is configured to form a broad panoramic sound field. 2.20hr battery life: a single ear can listen to songs for about 4 hours, with a 380mAh "big connotation" battery, the total battery life is up to about 20 hours. 3.Type-C charing port: Charging quickly and safely. 4.Pop-up window: two steps to connect, convenient and fast. 5.Smart APP: you can adjust the music equalizer, set the button language function, OTA upgrade, search for headphones, etc. through the QCY APP.