SMALL BUT MIGHTY - If it takes an earthquake or siren to wake you up, this classically designed clock is exactly what you are looking for. The 3-level adjustable shaker is ideal for heavy sleepers or those with hearing loss. You also have the option to combine the vibration with the built-in alarm sound (buzzer, bird, or music). EASY TO SETUP - Turning the two "ears" to set the time and alarm is extremely intuitive and straightforward. With all buttons clearly labeled and almost no two functions sharing the same button, it is easy to use right out of the box and adjust settings. CUSTOMIZABLE ALARM - The brightness of the clock is dial-controlled and adjustable from 0 to 100%. Dual alarms accommodate individuals who share a bed with a partner on a different morning schedule. Snooze function provides an extra 9 minutes of sleep. USB PORTS AND BATTERY BACKUP - One USB port located at the back allows charging of your mobile device while you sleep. AC-powered with the option to back up with 2 AAA batteries (not included) in case of power outage. Time, settings, and alarm functions are maintained during power loss (vibration and USB charging will not operate). 3-Level Adjustable Shaker - This vibrating clock includes three strength settings (gentle, medium, strong) for alarm vibration. The shaker is compact and discreet enough to fit under a pillow or mattress. Ideal for individuals who are deaf or for those who do not wish to disturb a partner with a loud alarm. Also suitable for extremely heavy sleepers. Dimmer Alarm Clock - 0-100% dial-adjusted dimmer allows reduction of screen brightness or complete turn-off to maintain a dark sleeping environment. No concerns about excessive brightness at night. Operation Mode: Electrical Shape: Round Alarm Clock: Yes Style: Classic Display Type: LCD Power Source: Corded Electric Material: ABS Color: As Shown in Picture Package Contents: 1 x Loud Dual Alarm Clock Note: Lighting and different display settings may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.