Skylink GM-434TL Long Range Household Alert & Alarm Home Security Protection Garage Door Sensor Accessory

The Skylink GM-434TL Long Range Garage Door Sensor couples with your existing garage door monitor unit to provide long-range protection. The sensor installs easily on your garage door and features a maximum range of up to 800 feet, making it ideal for larger homes or unattached garage structures. Rolling technology is used by the device to change the outgoing after every use, making sure that interference won't cause a false alarm and that the alarm system won't be circumvented. A Skylink Household Alert Kit is required for the sensor to communicate with (not included). A long-life 3V lithium battery is included. Overall dimensions: 2.5L x 4W x 1H inches. Long-range alert sensor for garage doors. Made from sturdy, solid black plastic. Manufacturer's 1-year warranty.