Ring 4XD3S7-0EN0 Alar Contact Sensor With Lithium Battery, 2 Pack

Highlights:

• Add-on wireless sensors
• 3V lithium battery included
• Requires the ring alarm security kit
• Sends alerts to your phone and tablet
• Triggers your alarm when someone tampers
• Secures windows and doors and sends alerts when they open
• Place alarm motion detectors in each room of your home to get mobile alerts whenever motion is detected indoors
• Number of package : 2