Product Description: Size: 8.7 x 4.3 x 1.7 inches (220 x 108 x 43 mm). It has a 12-hour or 24-hour display and can be switched.The brightness of the screen can be switched between 2 levels, and the white LED provides a large and bright digital display, making it easy to see from any angle.With 2 levels of volume adjustment, you can wake up even those who don’t like in the morning, so you don’t have to worry about sleeping.It has a snooze function that sounds again after about 8 minutes even if the alarm is stopped once, so it prevents you from oversleeping.Comes with a dedicated USB cable, so you can easily power it from your computer or charger.Note: 1. Power supply: USB powered. *Note: Due to high power consumption, we recommend USB power supply.With the use of a coin battery, you can remember the time and settings by simply preventing it from being displayed.2. Batteries not included.Please purchase separately.