JCC Smart Light Series Sensor Intelligent Backlight Large LCD Digital Alarm Clock Theremometer Calendar Bedside Desk Alarm Clock, Battery Operated (White) Multifunction 4 in 1: clock, alarm clock, thermometer, calendar. Large display and big numbers. Time (12/24), Calendar (MM/DD), Temperature, Alarm Time . light-activated mode: Turn On Sensor, back light automatically comes on when it's dark around. It's soft (brightness is normal backlight 25%), making you sleep easily or see time from a distance hands free. It can also be closed. If bright light needed, please Press light button to use nightlight, which lasts 6 seconds. Snooze function: repeats every 5 minutes (Touch the top button)