Size: 137 x 47 x 76mm. (Three batteries are included) HD display:Alarm clock Digital alarm clock with time, date and temperature, time can be switched between 12 hours and 24 hours. Very functional, silent and easy to read. Great decoration for desk, bedside, bedroom, home and office, etc. Adjustable Volume and Alarm Clock:Battery operated digital alarm clock with manual radio alarm volume adjustment. With the snooze function, you can take a short nap, wake up slowly and wake up comfortably in the morning. Light function:The electronic alarm clock has a light function. Press the "LIGHT" button to turn the night light on or off, so you can see it when you sleep or wake up at night. The glare will automatically turn off after 5 seconds.