Ring Contact Sensor / One size / Brand new & Sealed 🛍️ Same / Next Day Shipping ✈️ Over 100 + 5 🌟 Reviews ❤️ Check out our gram page with over 500+ Followers 📸 See our page for more under retail priced steals The Ring Contact Sensor 2nd Gen is a white wireless door alarm and window sensor that is compatible with Windows, iOS, and Android devices. It operates on battery power and includes two cameras, an alarm, and is smart home compatible with Amazon Alexa. This unit, manufactured in 2021, features Wi-Fi and Z-Wave connectivity, operates with an IP/Network surveillance technology, and has a 105 dB operating sound rating. Ideal for indoor use, this device provides added security and surveillance for your home.