about this item Multifunction Alarm Clock- Large screen, alarms, C or F temperature, 12H or 24H time modes. Touch or voice LED indicator with acoustic sensor. Dual Alarms and Sleep Mode- You can set two alarms at once to schedule your time appropriately. In Snooze mode, there is an extra 5 minutes of sleep. Adjustable Brightness- You can adjust the brightness to 4 levels. During charging, the LED screen always lights up and automatically adjusts the third-level brightness for the different periods. It not only saves energy, but also can be used as a night light as well. USB ChargingandLong StandbyThe alarm clock is powered by the included USB cable. Built-in 1200mAh lithium battery guarantees long standby time. It only takes 4-5 hours for full charging for alarm clock function time about 15-30 days. No need to charge or replace the battery frequently.replace the battery frequently. Mirror Design- This alarm clock has a mirror surface making it aesthetically pleasing with the sleek design. It is really a perfect item for office and life