Usage Tips:1. Alarm Clock with Bed Vibration Function - This alarm clock comes with a bed vibration function, which is perfect for heavy sleepers. If ordinary alarm clocks can't wake you up, if you are worried that the alarm sound will disturb others, if you are hearing-impaired, our alarm clock is a perfect choice for you.2. Loud Alarm Clock - This alarm clock has an incredibly loud 110 decibel alarm, which can wake up even the deepest sleepers. This clock has 4 volume control settings, and you can easily switch between different volume levels to find the volume that wakes you up comfortably and on time every morning.3. Alarm Clock with Large Blue LED Display - The numbers are 2.56 inches high, which can be easily seen from the other side of the room even if you have poor eyesight. The alarm clock has an extra-large display, allowing you to check the time at a glance. No more squinting or straining to see the time.4. Adjustable Brightness Digital Clock - The clock display can be brightened to suit the lighting situation in the bedroom. Our alarm clock has 5 levels of brightness, and you can adjust the brightness at night so as not to disturb your sleep.