Material: Main body ABS (plastic)Size: Width 13.5X Thickness 4.5X Height 7.5cmLCD Display: Big numbers, 85dB loud alarm, clearly display time, date, month and indoor temperature. The buttons on the back are very clear and selfexplanatory, so it's very easy to operate. 1224 hour format and FC units can be switched.Smart Light Sensor: The digital clock has a builtin ambient light control LCD device, when the room or environment becomes very dark, the LCD backlight turns on automatically (NOTE: This function must turn on the sensor button to work).EASY CLOCK FUNCTIONS: Intuitive set button, experience zero stress when setting time or alarm. It's easy for kids, seniors and seniors. It can be placed in the bedroom, on the table or anywhere you need. The digital alarm clock is powered by 3 AAA batteries (not included). No power cord required.