Compatible with Yale Smart Alarm Up to 100dB Adjustable Siren Flashing LED Lights Weatherproof Real-Time Alerts The Yale Outdoor Siren - Grey, has an external loud siren that reaches 100dB and flashing LED lights that acts as a clear deterrent for any intruder. Powerful adjustable sirenThe Yale Outdoor Siren features an external loud siren reaching an impressive 100dB, that will sound off when triggered, sending a clear message to any unwanted guests that they are not welcome.Eye-catching flashing LEDComplementing the powerful smart alarm siren, the built-in LED flashes, creating an additional visual deterrent that cannot be ignored. Sending a clear message that your home is protected and monitored.Yale Logo BacklitEven in the darkest hours, the Yale logo on the smart alarm Outdoor Siren is designed to light up (12v power required, not supplied), ensuring your property remains visible and protected at all times.1km Range ProtectionExperience exceptional protection with an impressive co