Advanced technology for better performancePack of two Ring Alarm sensors detect if glass windows and doors of your home or office are broken and shatteredEquipped with AI technology to detect glass breakage up to 25 feet distanceZ-wave connection cuts down cost and lets your sensor exchange data and commands wirelesslyPowered by AA Alkaline battery to last longer and for enhanced performanceHands-free operation Designed to work indoors with Ring Alarm or Ring Alarm Pro systems and is compatible with iOS and Android devicesRing alarm sensor works well with Amazon Alexa for hands-free operationServices and subscriptionsSensor sends immediate notifications whenever it detects a glass breakageRegister in professional monitoring with a Ring Protect Pro subscription (sold separately) to receive calls from monitoring center, whenever sensor detects a breaking glassRing alarm and professional monitoring service is available only within Canada (excluding Quebec)Requires Ring Alarm or Ring Alarm ProRing Alarm and all Ring Alarm accessories require a subscription for digital notifications, in-app features, digital arming/disarming, and integration with other Ring, Echo, and third party products. Subscription sold separately. Terms and conditions apply