The DMB Tyxal+ is an infrared motion detector that can secure one or more rooms in a home. It is ideal for securing large rooms and passageways. The detector is connected wirelessly to the alarm control panel and is powered by a battery (included) that lasts up to 10 years. The motion detector comes with 2 lenses: a standard lens and an animal-immune lens that prevents unwanted triggering by pets walking past. In the event of a break-in, the detector sends a signal to the control center, which then sounds the siren (up to 109 decibels depending on the setting).