Digital Projection Alarm Clock for Bedroom, Large Ceiling Projection Alarm Clock with USB Port, Battery Backup, 180° Projector, LED Display, BlackProduct Description Color: Black Material: plastic + quartz glass mirror Product size: 13.5 * 3 * 8 cm Power supply: 2 AAA batteries (not included) or USB power cable (included) Package contents: 1 x alarm clock projection 1 x USB cable 1 x user manual 1. All-in-one functions: Wireless projection alarm clock with internal temperature and humidity display; Temperature and time projection with ON/OFF button; 1 USB charger; 2 alarm and snooze functions; DCF automatic time adjustment with time zone selection; Calendar with 7 language options; Time in 12/24-hour format. 2. Projection function: All information on the screen can be easily read from any angle. Project time and temperature simultaneously. Press the button to project with battery for 8 seconds and hold the project with power, you can also use the ON/OFF button to control it. The adjustable time angle makes it easy to choose the right angle. 3. Automatic clock, room temperature and humidity: The atomic clock automatically displays the correct time (12/24-hour format) for you. The interior temperature and humidity units are clearly displayed. The temperature is displayed in °C or in °F. These additional functions help you make a decision about your daily clothes. 4. USB connection, dual alarms with snooze function: Set two separate alarms for different purposes. Press the top button to put the alarm to sleep for another five minutes of sleep. The USB output interface on the clock allows for easy charging of the electronic device. 5. Dimensions and power supply: approx. 13.5 * 4 * 8.5 cm; 2x AAA batteries (not included) or AC adapter (included). Touch the top of the clock to activate backlight and projection for 8 seconds. The backlight and projection keep the light and backlight to a selection of 4 levels with power supply. You can run it on battery power to wake up this alarm clock. projection can be used for outdoor travel.