BrematicPRO wireless siren SIR 868 01 Effective burglary protection for your smart home: The siren with integrated flashing light not only scares off burglars with a loud warning signal and alerts the neighbors, but also sends you a notification on your cell phone if you wish when paired with the gateway and the free app. Smart home siren inside and outside alarms in two different ways: - acoustic alarm with 100 dB(A) - optical with LED flashing light. Tamper contact to detect manipulation or dismantling. Simple and flexible installation.