PEAKEEP Loud 5 Wake-up Alarm Sounds Battery Digital Alarm Clock for Heavy Sleepers, Temporary Backlight, Rotary Knob for Easy Set, 2 AA Batteries RequiredWhite with Teal Fantastic 5 wake-up sounds: Digital alarm clocks can work 5 built-in loud blasting alarm sounds as per your selection which can jar heavy sleepers awake, including nature sounds of bird tweet, chirrup & croak, a seagull screams and gentle splash of sea waves, 1 animal sound of a cock crows, and 1 sweet melody. Warm Tips: Alarm volume cant be adjusted. Rotary Knob for Easy Set: This item is also distinguished by the rotary knob. Hold top button and alarm button, you can enter corresponding setting process, then just simply tune the rotary knob clockwise or counterclockwise to increase or decrease all the displays, including the calendar: clock time (12/24 Hour), month/date/year, day of week, the alarm time and wake-up sound options. Separate Alarm Switch: These days the alarm is not required, you can get easy access to disable the alarm function with the separate alarm switch which located at the back, the alarm time will dismiss accordingly so that you can clearly know the case of alarm ON-OFF. Temporary Backlight and Snooze: Press the top easy-access large round button to illuminate the entire dial for night time viewing. This also suspends the alarm for 8 minutes which offers you an extra light sleep. Battery Powered: Run by 2 AA batteries (NOT INCLUDED IN THE BOX). Size: 7" x 2 1/8" x 2 1/4". Simple yet elegant design boasts an arc streamlined silhouette. Unlimited 366 days Warranty!