Ring Alarm Contact Sensor 2nd Gen — Instant Door/Window Alerts, Slim & Easy Install

Smart, real-time alerts that fit your life

The Ring Alarm Contact Sensor 2nd Gen is a compact, low-profile sensor designed to monitor doors and windows without overpowering your frames. When a door or window opens, you’ll receive a fast notification on your phone, helping you stay on top of activities in and around your home. Its slim design blends with most interiors, making placement flexible while keeping the space visually clean.

Maximize placement without compromising style

Optimized for versatility, this sensor fits a wide range of frames—from modern interior doors to heavier entryways. The reduced footprint means you have more options for where to place alerts, so you can customize coverage where it matters most without drawing attention to the device itself.

• Instant mobile alerts when doors or windows open
• Smaller size enables more placement options
• No tools required for installation
• Includes two 3V CR2032 batteries
• Requires the Ring Alarm Base Station to operate

With the included batteries and an efficient design, the sensor is built to last—approximately three years of battery life under typical usage. This long-lasting power helps you reduce maintenance while staying informed about activity at entry points.

Enhance your Ring ecosystem with smart capabilities

Pair this sensor with a Ring Home subscription (sold separately) to access more context around events. If you have eligible cameras, you can review footage 24/7, scroll back to rewatch moments, and receive alerts for people or packages as they appear. This broader view adds useful context to door and window activity, without requiring extra effort from you.

In the box you’ll find everything you need to get started quickly: the sensor itself and two batteries. As a component of the Ring Alarm system, it integrates with your existing setup to provide a streamlined, scalable security solution that adapts to your routine and the layout of your home.

• Two 3V CR2032 batteries included
• Base Station required for operation

Real-life scenarios you might consider include monitoring a front door for guest arrivals, keeping an outer bedroom window in view for late-night activity, or creating a quick alert network around high-traffic entry points. The combination of instant alerts, a slim design, and tools-free installation offers a practical, non-intrusive way to stay connected to what matters most—without overwhelming your space or your day.