About this item 1. Time display: can display time via 12-hour or 24-hour clock and can display date by month day and year (year 2000-2099) 2. Temperature display: can display temperature in degrees Celsius (0C to 50C) or Fahrenheit (2F to 122F). 3. Alarm clock with snooze function: the default snooze time is 5 minutes and can be adjusted between 5 and 60 minutes. 4. Night model: the LED light dims automatically at night (18:00-06:00) and comes on during the day. 5. Data memory function: when using only 3 AAA batteries as power supply the clock can memorize your setting but the display only lights up for 5 seconds - you have to press the button to switch the display on again. When using only a USB cable as power supply, the screen can still be switched on, but your setting cannot be saved when the power supply is switched off. We therefore suggest that you use batteries and a USB cable at the same time.