Leviton 45A00-1 64-Zone Wireless Receiver 433mhz For Use In Domestic &amp; International Installations Allows Up To 64 Unique Wireless Security Transmitters To Report Information To An Leviton Controller Transmitters Replace Wired Door &amp; Window Sensors As Well As Wired Smoke, Motion &amp; Glass-break Detectors All Omni Wireless security products require the use of this 64 Zone Wireless Receiver Allows for up to 64 unique wireless security transmitters to report information to your automation system 433 MHz for use in USA and international installations Equipped with RSSI (Received Signal Strength Indication) to help an installer determine if transmitters will work where they are placed Leviton recommends professional installation on Security and Automation products. To find an installer in your area, please email dealer@leviton.com