Smoke Detector senses the typical fire indicators such as heat and smoke and powered by 10-33VDC. It is fed directly from the KNX bus and there is no need for any other power supply. In case of high temperatures, smoke, or fire emergencies, the alarm signal in the product starts to sound. While it provides an easy installation with its twist-lock mounting system, it also provides long-term and safe use with its tamper-resistant design.