LARGE 7" MIRROR LED DISPLAY: Our digital alarm clock comes with a 7" mirror LED display so you can clearly see the time even if you're 30 feet away from your bedroom. At the same time, this alarm clock can be used as a makeup mirror that will keep you beautiful all day. The acrylic mirror is specially treated and will not be easy to scratch. Multi-function clock and snooze function: This is a smart desk clock with C temperature, 12h and 24h, date mode and snooze function . The snooze button is located in a convenient central location, you can easily turn off the alarm without opening your eyes to get 5 minutes of sleep time. To avoid oversleeping, the alarm will sound every 5 minutes until it is completely off, which is a good choice for heavy people. Default in 5 minutes, 1-60 minutes can be set. 2 Brightness Levels Adjustable: This mirror clock has 2 brightness levels, you can switch manual/automatic to comfortable brightness; and the LED light will automatically dim during your sleeping time to protect your eyes at night and save energy. No blinding light or disturbing noises to disturb your sleep, creates a peaceful environment for sleep. It is dark between 6:00 p.m. and 6:00 a.m. (default), the time can be set up by yourself. USB charging port and battery power supply: Power supply by two modes: DC power supply and battery mode. With a micro USB power cable (included), you can plug it into any USB port to keep the clock running; Battery mode: It takes 3 AAA batteries (not included) to set the time and alarm. Use the battery, leave this alarm clock in power saving mode, the screen can be woken up by sounds. And the time memory function also requires battery.