Rotatable Projector - The projector can be rotated 180° for ceiling or wall projection. The projection brightness can be adjusted between high, medium, low or off as needed. Large LED Screen - Large LED screen for clear display of time and other setup icons. The screen brightness can be adjusted to three levels: high, low and off, to avoid disturbing sleep. Can switch 12/24 hours; Please note that this projection alarm clock needs to be connected to a power source. 7 alarm ringtones and Snooze function - you can select 7 different ringtones: waves, piano, nightingale song, beep, singing seagull and FM radio. Snooze function every 10 minutes with up to 3 repetitions so you don't oversleep. FM Radio - Record up to 15 preset FM radio stations with a frequency between 76 and 108 MHz. br> USB Port - Design with USB output port on the back of the alarm clock for convenient charging of your smartphone. Please note that this projection alarm clock must be connected to a power source in order to be used.-