1. Projection time: Project the time onto the wall or ceiling so that the complete time can always be seen. The view is very clear, but it not disturb you when you sleep. The recommended projection distance on the ceiling or wall is 3.3~9.8 feet (1~5 m) 2. Rotatable: 180-degree rotating projection, you can check the time without flipping 3. Date, alarm, time display: automatically display the correct time/date, the alarm setting can be restored after power failure 4. Snooze function: set separate alarms for different purposes. If you want to sleep for another five minutes, the button 5. Color display: interesting colors of backlight 6. Temperature and humidity display: the highest and lowest temperature and humidity records be displayed 7. Large display: It has a large display, which is especially suitable for children and the elderly to read Specification: Display mode: LED Projection distance: 1-5M LED backlight: support Humidity display: 20%RH to 99%RH Temperature display: 0