AUSounds AU-STREAM Benutzerhandbücher Seite 7

CHARGING
Battery life
Please charge for 1 hour prior to first use. Allow an additional 15
minutes once inital charge has been completed. In Bluetooth mode
only, a single play can last up to 6 hours. After noise reduction is
enabled, the single play is 5 hours, and the total battery life can reach
20 hours with charging case.
Earbuds
Put the earbuds in the charging case and they will automatically shut
down and enter the charging state.
Charging case