The F9 Airbuds it has higher classical sound with high volume and long lasting battery the Airbud can play for more than 20hrs and last for 1 week with his power bank even if there is no light,not just that only.
1.it has fingerprint touch sensor
2.it has waterproof
3.it has power Bank that can charge your phone
4.Auto match
5.1key control
6.Noise Reduce
7.the Airpod battery and his power bank can last for a week.