Features: Large LCD displays time (12/24),calendar (MM/DD), temperature (?/?), alarm status (ON/OFF). Snooze function, snooze interval adjustable. If bright light needed, please touch the top to use nightlight, which lasts 5 seconds. Smart light auto sensor automatically illuminates display in a dark environment. The normal measuring range of temperature is -10? to 50?(14? to 122?). Power Supply: 3 * AAA batteries (Not included).