Features: 4.3 x 2 large display and big bold 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) (updated on Sep 16th), Alarm (ON/OFF). Sensor & Night Light: Fristly, clock doesn't light up in the day time. When it's dark around, Sensor Light will be activated automatically, whose soft background light help you read time but not disturb sleeping. Sensor light function can also be turned off. There's also Night Light, which is brighter than sensor light but stays on for seconds. To use Night light, simply press SNOOZE/LIGHT button on the top of the clock. Snooze repeats every 5 minutes and beeping alarm from weak to strong. energy-saving (3 AAA batteries last about 3 months, not included) and user-friendly. QuietCare to ensure a good sleep and best working environment.