BINGONE Digital Alarm Clock with Smart Controllable Backlight Repeating Snooze with Date Temperature Display White Time (12/24), Calendar (MM/DD), Temperature (C/F), Alarm Status (ON/OFF). Sensor automatically comes on when it's dark around, because it's light-activated. It's soft, making you sleep easily or see time from a distance hands free. It can also be Four Steps crescendo alarm, ascending "beeping" alarm for gentle wake; Snooze repeats every 5 minutes (press the top button) Way of Power Supply: Battery Backup (3 AAA batteries, not included) 4.3 X 1.9 large display and big numbers. Time can be read within about 33 feet in the day time or 16 feet at night