The product is designed with the blue LED backlight which will automatically turn off after about 3 seconds. The product is multifunctional, which includes the functions of the digital calendar, thermometer display(temperature may has a little error), alarm clock function, snooze function, reverse timer, music appreciation, and birthday reminder. Made of the premium plastic material, the product is durable, lightweight and portable. The length of the product is 13cm, and the width is 7cm. It is used for the alarm clock and the calendar. Item Name: Alarm Clock Material:Plastic Battery Model: 3 x AAA Batteries (Not Included) Size Details: 13cm x 7cm/5.12" x 2.76" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 X Alarm Clock