Ring Contact Sensor For Ring Alarm Systems

Expand the reach of your Ring alarm system with help from this contact sensor. Simply mount it to a window or door, link it to your base station (sold separately) and instantly receive notifications on your mobile device whenever they open. Wirelessly connects to your Ring alarm system.Requires the Ring alarm base station (sold separately). Mounts to most doors and windows in your home. Sends alerts to your connected Android or iOS mobile phone or tablet when monitored doors or windows are opened. Tool-free installation allows simple setup. Includes a 3V lithium battery. Backed by the manufacturers 1-year limited warranty.