Free Brightness Selection: This digital alarm clock is equipped with a 0%-100% dimmer, no need to press the button frequently, more freedom to choose the brightness you want. The curved surface design conforms to the human visual habits, which makes the viewing angle larger, and the time read easily with a single glance. Note: The brightness of the screen and projector are separate without affecting each other. Clear and Large Projector: This projection clock with a 180 rotatable projector, can easily project the time on the ceiling or wall. The projection image can be turned upside down, which will ensure the numbers are always right-side-up. Reading anytime, whether you are lying down, sitting, or just waking up. optimum projection distance 1.6-9.8ft (0.5-3m). Clock Radio with Sleep Timer: Easy to tune in FM radio channel (FM: 86.0MHz to 108.0MHz), and select the specified volume by 0%-100% Radio volume adjustment. Up to 30 FM radio channels can be stored. The sleep timer fun