Monitor indoor temperature easily with the FIRST ALERT SFA2200. This home weather station is perfect for the living room or on the nightstand. It features an easy to read color display and a built-in red LED projector that allows you to view the time display on your ceiling or wall! The large display shows indoor temperature, humidity, time, day of the week, and a 12-hour temperature trend bar graph. Other features include an alarm clock with snooze function. The unit operates on 120V AC (adaptor included) or on two (2) x “AAA” batteries (not included).