Compatible with Yale Smart Alarm Adjustable 85dB siren Sounds when alarm is triggered Built-in LED Indoor use Add up to 100 alarm accessories In case of any break-in, the Yale Indoor Siren will sound (adjustable volume, up 85dB), and the built-in LED will flash, acting as a clear deterrent for any unwanted guests.Powerful adjustable alarm sirenEmpowered with an adjustable volume reaching up to 85dB, the smart alarm Indoor Siren will sound when triggered, sending a clear message to any unwanted guests that they are not welcome.A customisable security system to suit your lifestyleComplementing the powerful 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.Audible arming and disarming tonesDuring the arming and disarming of your smart alarm, the siren emits distinct audible countdown tones, enhancing your peace of mind.1km Range ProtectionExperience exceptional protection with