The touch-screen monitor keeps track of the indoor and outdoor sensors, and also displays local weather/barometric pressure forecasts. Additionally, it has a calendar/clock, an alarm that sounds when sensors detect conditions beyond parameters set by the user, a memory button for retrieving past data, and an AC power adapter. (Its backup battery-power unit requires four AA batteries--not included.) The system can support three additional remote sensors and can interface with a PC. Additional sensors, the PC-link software/cable kit, and a long-term data-memory accessory are all sold separately. --Fred Brack