1.The 180°(-90° to 90°) projection alarm clock for bedroom. 7.3" large LED mirror display projected a clear time on your wall or ceiling. Alarm clock allowing you to easily and clearly read the time on the ceiling or wall within a distance of 5m. 2.The ceiling clock has 15 level adjustable volume and 4 level brightness settings.Bright-Medium-Dim-Off, the volume and brightness can be adjusted according to the user's habits. The smart clock also has light sensor automatic dimming function, according to different light automatically adjust, protect your eyes. 3.The projector alarm clock adopts dual alarm clock settings, and the mirror will display temperature and humidity, which can automatically adjust temperature and humidity (℃) according to environmental changes. Note: The humidity deviation is ±5, and the temperature deviation is ±1. 4.The FM radio alarm clock can automatically search, lock, and storage unlimited number stations within 76-108 MHz for your quickly and easily use. Adopting auto-off function allows you to set 5 to 60 minutes sleep timer and it will turn off automatically after the specified timer. 5.The projection clock has 5V USB charging port, output interface allow you to charge cellphone, tablets and other electronics devices simultaneously when you charge the LED alarm clock. Backup Memory battery(included) can remain clock time working normally and remember original time /alarm/radio/snooze settings, no need to reset while in case of power failure.