The Aico EI100MRF RadioLINK+ Module is an essential addition to your home security system. This white module is designed to fit seamlessly with your Aico smoke alarms, providing a reliable and effective solution for detecting smoke and alerting you to any potential fires. With its advanced RadioLINK+ technology, this module can communicate with your mains-powered smoke alarms, ensuring that you are always warned of any potential dangers. The Aico EI100MRF RadioLINK+ Module is the perfect choice for anyone looking for a high-quality smoke alarm solution for their home.