Large Screen Display 5.5" High Resolution Digital Alarm Clock clearly spells out the time, date, temp. Illuminated LED digits ensure it's clear enough to see the time even in the distance. Alarm & Snooze 6 volumes adjustable with 8 ringtones for you choose, pick your favorite sound among 8 alarm sound options. Before the alarm stops itself, easy snooze with a simple press of the top button to get an extra 9-mins nap. This alarm clock will be ringsing for 3 minutes and five times cycled. Adjustable Brightness 6 Brightness Levels from 5% to 100%, that can be adjusted to your needs. It helps to read time in dark or in the middle of the night to know the time. And it is also absolutely not too bright to bother when sleeping. Outlet Powered with Battery Backup Plug in to power the clock with the DC adapter(NOT Included). You have the option to back it up with 3*AAA batteries (NOT Included). NOTE: With backup battery power source only, the screen will go blank after 10s. you can press any button to light the screen, and the display will be alaways lit after power is restored. Save Space & Easy OperateSmall footprint(5.5"x1.5"x3.7"), you can place it on your desk, bedside or anywhere else. It is an easy setup alarm clock. By long pressing the time/alarm button on back and the up and down button to adjust time,12/24H,/C. Easy for adults, children, teens, seniors and the elderly, experience zero stress when setting the time and alarm.