RISCO's 2-way Wireless Door/ Window Contact RWX73M is a supervised transmitter ideal for wireless perimeter door/ window protection in residential and small commercial applications. The transmitter has a built in magnetic contact and additional zone input that can be connected to wired magnetic contacts or to other wired sensors that can be used for various control or security applications.It operates together with RISCO Group's 2-Way wireless systems and is powered by a standard 3-V lithium battery. Its 2-Way wireless communication provides higher security reduced wireless congestion reduced RF communication and remote Control & Diagnostics The RWX73M is easy to install using a simple bracket to wall installation and easy to program using RISCO's remote configuration software.  Price available on request.