Modern Wooden LED Digital Alarm Cube Clock Thermometer Timer Calendar (White) Dimensions: 2.5 x 2.5 x 2.5 inches (W x H x D) Tells time, date, temp and also has an alarm clock function. Powered by USB cable (included) or 3 AA batteries (not included) Optional Five Alarm Settings with "beep" sound lasting 1 minute Time display 12-hour or 24-hour mode