SHOKZ OpenFit Open-Ear True Wireless Earbuds (Black) - Manual (Page 24)

2. Off
When the charging case is closed after the two earbuds are
placed inside, the earbuds will be switched off.
3. Standby
When the earbuds are not in the charging case and are not
connected to the device for 3 minutes, the earbuds will switch
to standby mode to reserve earbud battery power.
ON/OFF AND STANDBY
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