When turned off, the monitor automatically enters Voice-Activated (VOX) mode. This mode conserves battery power by only activating the monitor when detecting sound. You can adjust the sensitivity of this mode in the Sleep settings.

There are two Sleep mode options:

1. VOX Mode: The monitor remains silent when inactive. It activates and sounds an alarm only when significant noise is detected.

2. Only Audio Mode: The monitor continues playing ambient sound even when the screen is off. To wake the monitor, you'll need to manually activate it.

If you have any other questions regarding the Baby Monitor E20/E21, please don't hesitate to contact us for further assistance.