Outdoor siren for use with Yale smart alarm (sold separately) and Yale Home app. Easy to install, set-up and control using the app. Provides a visual deterrent to improve home security and enhance peace of mind. Features adjustable siren up to 100dB, flashing LED and real-time tamper alerts sent directly to user's phone/smart watch. Compatible with Yale alarm accessories (available separately). Supplied with wall screws and wall plugs. Works with - Amazon Alexa - Google Home - iOS App - Android App Tamper Alert 1000m Wireless Range Compatible with Yale Smart Alarm Flashing LED Adjustable Up to 100dB Weatherproof Smart Hub Required Works with - Amazon Alexa - Google Home - iOS App - Android App Tamper Alert 1000m Wireless Range Compatible with Yale Smart Alarm Flashing LED Adjustable Up to 100dB Weatherproof Smart Hub Required