Easy, wireless home monitoring. This sensor detects when your garage door is opened. It then sends a wireless signal to your SK6 alarm or dialer to notify you. The lock switch lets you disable notifications when they're not wanted. The sensor is water resistant so it's safe in your garage. The package includes the sensor, the required CR2032 battery, as well as screws and double-sided tape for your preferred installation. Note that the sensor itself doesn't emit any alarm. It must be paired with a compatible SK6-Series alarm or telephone dialer from Ideal Security. It can communicate with a receiver up to 40m (130ft) away.