Features: Easy to read, the large screen features enlarged numbers making it easy to read even in a long distance. Day and night automatically change color on time. Two display modes, single white light or automatic color changing. It is a alarm clock and also a night light/temperature meter, easy to set a time that wakes you up every morning. Four levels brightness, built-in high-sensitivity light sensor, the screen soft light automatically turns on in the dark environment. Temperature display function, real-time control of room temperature changes. Built-in intelligent temperature sensor, ready to show you the current ambient temperature. Specification: Material: ABS Power Input: USB Power Source Color Display: White + Blue Automatically turns blue at 18:00-7:59 in the evening. Change from blue to white light automatically at 7:59-8:00 in the morning. 18:00-7:59 in the evening, the status is blue light. 8:00-17:59 during the day, the status is white light. Change from white to blue light automatically 17:59-18:00 at night. Battery: 1 * CR2302 Button Battery (Not Included) Size: Approx. 24*9.4*1.7 cm / 9.4*3.7*0.7 in Package list: 1 * Clock (Battery Not Included) 1 * User Manual 1 * Data Cable Note: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.