With an additional door lock and the basic elements you increase your safety effectively. The Ring Alarm Contact Sensor expands your Ring The Ring Alarm Contact Sensor expands your Ring Alarm and adds an extra layer of security to your home. You can attach Alarm Contact Sensors to any door or window in your house or apartment, and when armed, you'll get instant alerts on your phone and tablet whenever they open. 38 Openpath’s access control hardware and enterprise cloud-based software give you peace of mind and protection to reopen your doors with confidence. Fast. Reliable. Basic fittings plus door lock Hands-free. Door security to keep out uninvited guests To protect your door and this way your home and family against burglary you should invest in the security of your door. Product Title Security Equipment Corp HS-DWA2 Premium White Door or Window Alarm 2 Pack Average rating: 4.5 out of 5 stars, based on 2 reviews 2 ratings Current Price $25.38 $ 25 .