◆Time Projection: It is expected that the temperature of Projection Clock will automatically change from indoor temperature to outdoor temperature, and it will be projected on the wall in soft red, the projection distance on the ceiling or wall should be 5 to 13 ft (1.5 to 4 m). ◆Snooze Function: Projection Alarm Clock sets two separate alarm clocks for different purposes, and has the snooze function, allowing you to get an additional five minutes of sleep. Press any button except the top button to stop the alarm. ◆Adjustable Backlight: Projection Digital Clock has a large digital display with 8-color cyclic change, which is displayed on LCD and wireless internal and external thermometer. Just press the "-" key to adjust the four brightness modes of the backlight, high medium low output. ◆USB Charging: Alarm Clock with Projection is USB charging. AC power is used for permanent projection and time display. The battery ensures that all settings are memorized during power failure. ◆Practical Gift: Clock Ceiling Projection can predict the weather, pressure and temperature in the next 12 hours; 12/24 hours, date and week are displayed on the 3-inch backlit LCD screen, the clock, wireless sensor and AC adapter are packaged in one box.