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Your cart is empty.Knowing when a door or window is opened or closed is one of the most important things to know in a home security system. This sensor mounts to a door or window to detect when it is opened or closed. When it detects a change in state, it sends an alarm signal through the Z Wave mesh network, which can then trigger preprogrammed responses, such as turning on a light or triggering an audible or silent alarm. The Monoprice Z Wave Plus Series 700 Door/Window Sensor complies with the Z Wave Plus series 700 standard, which is the latest and most powerful Z Wave series released. It features a longer wireless range, faster wireless speeds, and up to 10 years of battery life. Most importantly, it features the most powerful and robust security protocols, including the Security 2 (S2) Command Class and AES 128 bit encryption.