Receive an instant alert the moment someone enters a room on your property. The 360-Degree Ceiling PIR Motion Detector mounts on your ceiling and provides full 360-degree coverage for maximum range of sight. This passive infrared motion sensor uses a dual-element pyroelectric technology and provides superior RFI/EMI protection. The 360-Degree Ceiling PIR Motion Detector is a hardwired motion detector, but you can connect it to the Wireless Universal Transmitter (sold separately) to use it with the WisDom Wireless Security System.About the WisDom Wireless Security System The WisDom Wireless Security System is easy and quick to install, and it offers substantial cost savings over comparable wired systems. This expandable 433 MHz wireless security system is extremely flexible, so it will easily conform to the needs of your property. With features like remote voice control, dedicated buttons for simple emergency notifications, and programmable home automation with time scheduling, the WisDom Wireless Security System is a reliable, smart, and easy-to-operate system that offers the freedom of wireless sensors and control via phone from anywhere in the world.