Hense Morning Wake Up Alarm Clock with Intelligent Backlight Mute Silent LCD Electronic Alarm Clock with Large Display and Big Numbers Date and Temperature Display HA11(Blue) Multifunction : clock, alarm clock, thermometer, calendar , Touch lamp. Large display and big numbers. Time (12/24), Calendar ,Temperature (Centigrade/Degrees Fahrenheit), Alarm clock . Sensor automatically comes on when it's dark around, because it's light-activated. Let you more easily read time. Four Steps crescendo alarm,Ascending "beeping" alarm for Gently wake up. Power Source:3 AAA Battery(Not included). Product Dimensions: 3.0 inch x 1.8inch x 5.2inch