【50 FM Radio Stations & Sleep Timer】The projection radio alarm clock includes up to 50 FM radio stations. FM frequency: 76.0-108.0 MHz, the 33-inch long antenna can receive the signal better. You can use the projection alarm clock to automatically search and memorize channels, know news and current information at any time. With the sleep timer function, you can fall asleep comfortably while listening to the radio. 【180° Ultra-Clear Rotating Projection】This digital alarm clock can rotate the projection (-90° to 90°). Numbers can be projected onto the ceiling or wall in any direction you want. When you are lying in bed, you can see the weather projection on the ceiling. Optimal projection distance for the projection clock: 3-5 m. You can also change the projection brightness according to your needs. 【Dual Alarm and Snooze Function】The projection alarm clock with digital ceiling support supports dual alarms, meeting different needs. So two separate alarm times can be set simultaneously if you and your partner or children get up at different times. The snooze function provides an additional 5-60 minutes of sleep, the default snooze time is 5 minutes. 【USB Power Supply & Backup Battery】The ceiling projection alarm clock must be connected to a power source via a USB cable for it to work. There is also a USB output port on the back of the projection alarm clock, which can charge mobile phones or tablets. The CR2032 battery cannot power the alarm clock. It is used as a backup battery, if the power is cut off, the set time and alarm do not need to be reset. 【Multi-function Display, 4 Brightness Levels】: The radio alarm clock has a 7\" LED mirror display, which can be used as a mirror. The LED clock displays time (12/24H format), temperature and humidity (°F/°C convertible), alarm clock icon and four types of screen brightness (high/medium/low/off). High-definition projection is suitable for all ages. If you have any questions about how to use the projection alarm clock, please do not hesitate to contact us.