External siren for pairing with Yale Sync smart home alarm (sold separately) and Yale alarm app. Easy to install, set-up and control using the app via a phone or tablet. Provides a visual deterrent to improve home security and enhance peace of mind. Features 104dB siren and real-time alerts and notifications sent directly to user's phone/smart watch from anywhere in the world. Geolocation feature reminds user to set the alarm when leaving home. Powered by a 12V power supply plugged into the mains, with a built-in, battery-powered backup generator for use in the event of a power failure in the home. Supplied with wall screws and wall plugs. Works with - Amazon Alexa - Google Home - iOS App - Android App Tamper Alert 200m Wireless Range Compatible with Yale Sync Smart Alarm Battery Back Up 104dB Siren Smart Hub Required Works with - Amazon Alexa - Google Home - iOS App - Android App Tamper Alert 200m Wireless Range Compatible with Yale Sync Smart Alarm Battery Back Up 104dB Siren Sm...