Alarm clock, digital alarm clock, designed for the bedroom, works on mains power or batteries (black)

[How the Alarm Clock Works] When the digital alarm sounds, lightly press the large "Sniff" button on top to gain an extra 5 minutes of sleep (this function can be repeated up to 3 times). To completely disable "Sniff" mode, press and hold the "Sniff" button for 3 seconds. To turn off the alarm for the day (it will sound again the next day), simply press and hold the "Sniff" button for 3 seconds.

[Two Power Options: USB/Batteries] When the digital alarm clock is plugged into a power outlet (adapter not included), the screen remains on. When running on batteries (batteries not included), the screen automatically turns off after approximately 13 seconds of inactivity to conserve battery power. Press any button at this time to turn the screen back on. Note: Batteries discharge quickly; It is recommended to use the USB power adapter first.

[3-Level Brightness Adjustment] Press the center button to choose between 3 brightness levels (high/medium/low).

[USB Power and Battery Backup] This alarm clock primarily operates on mains power (AC adapter not included) and can be powered by 3 AAA batteries (not included) in the event of a power outage. In the event of a power failure, the alarm clock automatically switches to battery power and retains the time, date, and other settings. Note: Batteries discharge quickly; therefore, it is recommended to use them only as a backup power source and to prioritize mains power for everyday use.

[Helpful Reminder] If the device is powered by USB (AC adapter not included), the alarm clock display remains on. If it is running on batteries (not included), the alarm clock automatically enters power-saving mode and turns off the display after approximately 13 seconds. You can then reactivate it by pressing any button or using a voice command.