Adapter Powered with Memorized Battery: the electric alarm clock runs on electronic power and 2 AAA batteries (not supplied) can be used to store the clock setting in case of power cut. Batteries are not used to power the desk clock. AC adapter is included. USB Charging Ports: the alarm clock wood comes with USB ports for charing your phones, or other electric devices on nightstand so you don't need to go looking for other outlet, making it a handy wooden alarm clock for bedroom. 0-100% Adjustable Brightness: the display brightness of this bedroom alarm clock is 0-100% dimmable and you can set the brightness level with a smooth, continuous wheel control from zero (totally dark) to very bright so it's not glaring at night but still clear during the day, nice for bedroom night stand. The time format is 12/24Hr switchable. Dedicated Snooze Button & Adjustable Alarm Volume: the snooze button on top of the wooden digital alarm clock is intuitive and easy to access without having to wake up. You don’t need to press down a button, just tap/touch the top and you get extra 9 minutes sleep. The alarm volume for this digital wooden alarm clock is 30-90db adjustable so you can adjust the alarm volume per need. Sleek & Stylish Wood Decoration: this minimalist wooden digital clock is definitely a decent gift for anyone in view of its beautiful futuristic-looking which is good for bedroom décor, bedside table or office desk. The wood clock is also very easy to set up and use. With auto DST, the wood desk clock will automatically adjsut to daylight saving time, no resetting hassle. Large Wooden Alarm Clock with Big Bold Numbers, Date, Day of Week, 12/24Hr, Temp.