It is ideal for protecting doors and windows in a home. The unit is completely self contained and has a separate supervised sensor that monitors the battery life.

• Magnetic contact sensor.
• Notifies you when your door or window is opened.
• Supervised Sensor: monitors the sensors and their battery condition automatically.
• Lithium battery included.
• Operating range: 300 feet.
• Easy to set up.
• FCC/IC approved.
• Requires Skylink Receiver!
• One year warranty.