https://billson.blogspot.com/2020/12/review-i7s-tws-stereo.html
Fully charged before try:
Linked with Laptop, listen to YouTube: JAZZ MUSIC - LOUNGE MUSIC - CAFE MUSIC FOR RELAX, STUDY, WORK - YouTube
Left - 90 mins auto off
Right 100 mins auto off
Right 100 mins auto off
