1. All-in-one functions Wireless projection alarm clock with internal temperature and humidity display; Temperature & time projection with ON / OFF button; 1 USB chargers; 2 alarm and snooze functions; DCF automatic time setting with time zone selection; Calendar with 7 language choices; Time in 12/24 format.2. Projection function All information on the display can be easily read from any angle. Project time and temperature at the same time. Press the button to project with battery for 8 seconds and keep project with power supply, you can also use ON / OFF button to control it. Adjustable time angle facilitates the selection of the suitable angle.3. Automatic clock, indoor temperature and humidity Atomic clock automatically shows the correct time (12/24 format) for you. Indoor temperature and humidity units are clearly displayed. The temperature is displayed in either C or F. These additional features will help you make a decision about your daily clothing.4. USB connection, double alarm with snooze function Set two separate alarms for different purposes. Press the top button to doze off the alarm for an extra five minutes of sleep. USB output interface on watch enables easy charging of electronic device.5. Dimensions and power supply about 13.5 * 4 * 8.5cm; 2x AAA batteries (not included) or power adapter (included). Touch the top of the clock to activate the backlight and projection for 8 seconds. Backlight and projection keep light and the backlight has 4 level selection with power supply. You can run it on battery so this projection alarm clock can be used for outdoor travel.