?USB Charging Outlet Port & Battery Backup for Maintaining Power-Off Memory?There is a 5V USB output port behind the projection alarm clock, which allows you to charge your phone alongside your LED alarm clock while sleeping. If the power is off suddenly, the built-in button back-up battery can remain clock time working normally and remember original projector/alarm/radio/snooze settings, no need to reset. ?Dual Alarms Clock with 2 Sounds Selection & Snooze Function?Two separate alarms are designed for two or a family use, and you can choose buzzer sound, it will continue to 2 minutes if you don't turn off, or you can choose the radio sound and it will keep ringing to loudest until you turn off. You can press "snooze" after alarm sounds for extra 5-minute lazy sleep and repeat this step for another 5-minute which is defaulted, also can be set 5-60 minutes snooze time to meet your needs. ?FM Radio with 15 Level Adjustable Volume & Auto-Off Timer?Coming with an antenna, the fm radio alarm clock can automatically search, lock, and storage unlimited number stations within 76-108 MHz for your quick and easy access next time. You can adjust the 0-15 levels volumes to meet your most comfortable listening. Adopting auto-off function allows you to set 5 to 90 minutes sleep timer and it will turn off automatically after the specified timer. ?LED Display Radio Alarm Clock?The digital alarm clock has a large 7.5-inch LED mirror screen. The adjustment levels are: off, low, medium, high brightness (brightness can be adjusted manually). It can also be automatically dimmed by the light sensor. It will automatically adjust the display brightness according to the ambient brightness. Display time (12H/24H), indoor temperature (°F/°C) and indoor humidity. Note: The humidity deviation is ±5, and the temperature deviation is ±1. ?3 Level Dimmable Projection Clock?The digital projection clock has a 180° (-90° to 90°) adjustable projector, allowing you to easily and clearly read the time on the ceiling or wall within a distance of 5m/16.4ft , And the best projection distance is 3m/9.8ft. There are 3 levels of projection brightness (bright and off) to choose from. In addition, long press the "Projection" button to flip the projection view up and down 180°.