If you use the WisDom Wireless Security System in your home, you can connect a wireless smoke detector to your system for whole-house alerts in the event of a fire. The WisDom 433 MHz Wireless Smoke Detector is a battery-powered photoelectric smoke detector with a built-in supervised wireless transmitter. When sufficient smoke is detected, the detector will sound its alarm horn and the transmitter will send an alarm message to your 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.