3step brightnessautomatic adjustmentBattery only for memory function, the alarm clock only works with a connected USB cable. The LED display on the electronic clock offers three types of brightness low, medium and high light. You can freely choose the brightness. The LED clock is equipped with a lightsensitive sensor that automatically adjusts the brightness according to the light intensity on the screen.7 IN Large DisplayMirror surfaceThe digital clock is equipped with a 7inch LED display, allowing you to clearly read the time anywhere in the room. Alarm clock with unique acrylic mirror technology, fashionable and beautiful, can also be used as a makeup mirror.Dual USB charging portsPoweroff memoryThe mirror clock uses a DC5V1A USB power adapter with 2 USB ports, which you can use to charge your mobile phone and tablet. The modern clock is equipped with a CR2016 battery when the alarm is off. If the USB power supply is available, you can still save the alarm data.Removable baseWall hanging holeWhen the clock is installed on the base, it is a desk clock for desk, bed, dressing room. When the clock is removed from the base, it is a wall clock that can be installed on the wall through the hanging hole on the back and is suitable for bedrooms, offices, living rooms and kitchens.Snooze modeNight modeThe snooze button for the digital alarm clock is located on top of the clock and can be easily turned off, giving you 5 to 60 minutes of adjustable sleep time. Night mode means that the LED automatically switches to the lowest brightness display status at night. This does not affect your sleep.