Product DescriptionThe wireless open/closed sensor will give you the status of doors, windows, etc. Know if a building or specific area is being accessed when it should not be, or if a door or window has been left open. Set your Temp Alert system to notify you via SMS text, email, or both.The sensor is powered by two replaceable 1.5 V AA sized batteries (included with purchase). This sensor is also available with a line power option. Suggested Application Commercial property door and window access Residential property door and window access Bank owned foreclosure properties access monitoring Restricted area monitoring IT server rooms and closets Freezer and cooler doors Shipping cargo bay door monitoring Garage door monitoring Magnetic Sensor Specifications Switch Cycles 50 million Operation Gap Up to 3/4 inch Wire Leads 22 gauge / 15 inch length Magnet Alnico Magnet Case Construction Weatherproof, high-impact ABS plastic with self-adhesive backing Magnet Temperature Range -15°F to 160°F (-25°C to 70°C) AA Specifications Battery Type 2 Replaceable AA 1.5 V Batteries Dimension 4.375 in x 2.470 in x 1.12 in Sensing Element 2.0 - 3.6 V (2 x AA 1.5V Batteries or Optional Power Supply) Device Range 250 - 300 ft. non-line-of-sight device range* Battery Life At 1 hour heartbeat setting, included AA batteries will typically last 3-4 Years. ** Max Operating Temp Using AA Alkaline -18° to 55°C (0° to 130°F) Max Operating Temp Using AA Lithium -40° to 85°C (-40° to 185°F) Optimal Battery Operating Temp +10°C to +50°C (+50°F to +122°F) Enclosure Material ABS 900 MHz Specifications Operating Frequency 900 MHz Operating Frequency Certifications Complies with Part 15 of the FCC Rules. (FCC ID: ZTL-RFSC1)Complies with Industry Canada standards. (IC: 9794A-RFSC1) Sensor Comes with:(2) AA 1.5 V BatteriesMounting adhesive tape