ZHPUAT [New Version Smart Light Alarm Clock with Dimmer, Both Cord and Batteries Supply with Easy Operation (Sliver)&hellip; Plug it in to the provided power supply or battery powered. The simple & portable electric wake clock will be the best choice for home and outdoor. A perfect friend in traveling, bedrooms, cars, desk and shelf. Customizable backlight brightness is a characteristic feature of this elegant small bedside clock. We can turn the nightlight off, low or high. When it's on low or high, the nightlight comes on automatically in low light, but is off during the day. We can also make it brighter for 5 seconds by pressing the snooze/light button. On the main display, the time, alarm time(if applicable), date and temperature are all visible at once. The alarm sound is loud enough to wake any heavy sleepers up but is not abrasive on our ears or "jolts" us awake rudely. 12/24 hour mode makes a nice silent table clock and it's easy to change the temperature from Celsius to Fahrenheit. The snooze button is always handy and easy to find. Package Includes: A clock, An USB charger, An adapter and A backup battery(Only for memorizing time). 3 AAA Battery for power is not included. We strive to provide great customer service and want to make sure you are completely satisfied. If there are any issues, please contact us. Our customer support team is ready to help!