Alarm Clock w/ Date and Temperature Display, Repeating Snooze, Light-activated Sensor Light and Touch-activated Nightlight- Batteries/ USB powered (Blue) 4.3" x 2" large display and big numbers. Time can be read within 33 feet in the day time or 16 feet at night. Display: Time (12/24), Calendar (MM/DD), Temperature (C/F), Alarm (ON/OFF) Soft Sensor light automatically comes on when it's dark around, because it's light-activated. Sensor light can be turned on/off. If you need bright light, touch the top button to use nightlight. Bright nightlight is Touch-activated, lasts only 8 seconds. The two lights are designed for a reason: people can read time easily at night, but not get disturbed by their brightness. 2 Ways of Power Supply: Battery Backup (3 AAA batteries last about 3 months, not included) or USB powered (USB charger not included). Snooze repeats every 5 minutes and "beeping" alarm from weak to strong.