WAYCOM Silent Digital 6" Alarm Clock with Date and Temperature Display, Repeating Snooze, Light-activated Sensor Light and Touch-activated Nightlight- Batteries White light-activated alarm clock: Ascending "beeping" alarm for gentle wake. Sensor automatically comes on when it's dark around. If bright light needed, please touch the top to use nightlight, which lasts 8 seconds. Easy to read: 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. Time (12/24), Calendar (MM/DD), Temperature (C/F), Alarm Status (ON/OFF). Power Supply: 3* AAA batteries or DC 5V charger.(not included) Energy-saving and user-friendly wise clock: Quiet Care to ensure a good sleep and best working environment.