When the headphones are in an idle state (with no active tasks), they will enter standby mode after a timeout. (The auto-standby duration can be set in the app. The default is 30 minutes, and can be extended to up to 4 hours.)
In standby mode:
If Bluetooth is connected, the headphones will remain in standby mode until they shut down due to low battery.
If Bluetooth is not connected, the headphones will shut down after 1 hour of inactivity (no operations performed).
During standby mode, the headphones can reconnect successfully and return to normal working mode either by the phone initiating a reconnection or by pressing any button on the headphones.