The MDO BL Tyxal+ is a micro opening detector that can be used to secure doors or windows. It is connected wirelessly to the control panel and the battery supplied lasts up to 3 years depending on use. It is ideal for securing rarely used exits or windows. Its small size makes it very easy to integrate into your home. In the event of a break-in, the detector sends a signal to the alarm center, which sounds the siren (up to 109 decibels depending on the setting).