DESC: Description: Created to meet consumer demand for less conspicuous security sensors, the Micro is the smallest sensor of its kind in the security industry. The wireless Micro, for residential and commercial intrusion detection, is only 1.75" long by .875" wide by .5" high--or 84% smaller than standard door/window security sensors. Features: Small size, low profile is inconspicuous User-replaceable battery lasts 5 years in typical installations. Advanced circuit design saves power and extends battery life Specifications Magnet included Color: White Dimensions: 1.75" long, .875" wide, .5" high Battery: 3.0 volt lithium coin-cell Item Code: NX454