Barometric pressure and outdoor temperature with 900mhz battery operated transmitter No cables makes it easier than ever to bring the weather story into your home. This wireless version of our popular Mystic instrument operates at a powerful 900mhz which allows for up to 300' transmission distance in typical residential installations. When outdoor temperatures change, Mystic receives updates every 2 seconds. The wireless temperature transmitter operates for up to 18 months on 2 AA batteries (included). Mystic provides a digital display of both barometer pressure and temperature in four different modes: Present, High, Low, and Rate of Change for barometric pressure, which shows the amount of change in inches per hour. When connected to a 900mhz Wireless Receiver (sold separately) is required to operate this system. Specify altitude if above 3000'.
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