Note: This loud alarm clock for serious sleepers is powered by 3 AAA batteries (not included). No wires required. Very easy to use. It is a simple cordless battery powered alarm clock with a large clear display, smart low night light, 12/24 hours, room temperature, easy to use for kids, teens, essential bedroom nightstand desk gift alarm clock. The smart night light digital alarm clock measures 5.43*3.15*1.77 inches, small and lightweight. Features extra large display and numbers. Easily readable from a distance by people of all ages, additional on-screen information includes month, date, alarm settings and room temperature. Details and Quality: Large numbers, 85dB loud alarm, clear display of time, date, month and room temperature. The buttons on the back are very clear and self-explanatory. 12/24 hour format and F/C units switchable. The digital clock has a built-in ambient light control LCD device. When the room or environment becomes very dark, the LCD backlight automatically turns on (note: this function must turn on the sensor button to work). Anywhere you want: providing you with a comfortable and convenient life. Suitable for children, seniors and seniors. It can be placed in your bedroom, on your desk, or anywhere you need it. Let you fall asleep easily and wake you up comfortably in the morning. The alarm gradually amplifies, and the ascending "beep" alarm gently wakes up and then turns itself off. Press SNOOZE to pause the alarm temporarily and sound again after 5 minutes.