Easy Setup-Press the time button until the displayed time flashes, then use the wheel to change the time. Compared with the old version, this upgraded adjustment wheel design of our digital clock makes the set-up much more easier.Adjustable Brightness-Compared with the old version of 3-level dimming, this new version digital clock has more brightness choices, you can easily adjust to to your taste. And it is also absolutely not too bright to bother when sleeping.Convenient Alarm Setting-Compared with the old version, the new alarm clock is upgraded from 3 alarms to 1 alarm and it is easier to be turned off.Power Supply-USB Cable (included). This digital alarm clock is operated vis USB power cord. NO Batteries.2 Display Formats-Our digital alarm clock has options for 12 or 24 hour display and celsius or fahrenheit switching.