SMALL BUT MIGHTY - If it takes an earthquake or siren to wake you up, this classically designed clock is exactly what you need. The 3-level adjustable shaker is ideal for heavy sleepers or those with hearing loss. You can also choose 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 intuitive and straightforward. With all buttons clearly labeled and nearly no shared functions, it's easy to use right out of the box and adjust settings as needed. CUSTOMIZABLE ALARM - The brightness of the display is dial-controlled and adjustable from 0 to 100%. Dual alarms accommodate individuals sharing a bed with different morning schedules. Snooze function provides an extra 9 minutes of rest. USB PORTS AND BATTERY BACKUP - One USB port on the back allows charging your mobile device overnight. Powered by AC adapter, with optional backup using 2 AAA batteries (not included) during power outages. Time, settings, and alarms are maintained during backup (vibration and USB charging do not function). 3-Level Adjustable Shaker This vibrating alarm clock offers three vibration intensity levels (gentle, medium, strong). The compact shaker fits easily under a pillow or mattress without being noticeable. Ideal for individuals who are deaf, hard of hearing, or anyone who prefers not to disturb a partner with a loud alarm. Also effective for extremely heavy sleepers. Dimmer Alarm Clock 0-100% Dial-Adjusted Brightness Control Allows you to reduce or completely turn off the display brightness for a darker sleeping environment. No more light disturbance 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 photo Package Contents: 1 x Loud Dual Alarm Clock Note: Light and screen differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.