The Ei3024 Multi Sensor Fire Alarm is built on the same high-quality, reliable, and proven technology that all Aico Alarms are renowned for. It contains the latest high-tech enhancements, making it the most effective domestic fire alarm on the market. The alarm features both an Optical and Heat sensor for a comprehensive fire response. It is mains powered with a 10-year rechargeable lithium cell back-up. You can enhance its functionality by adding an Ei3000MRF module for wireless interconnection and data extraction. The alarm is compatible with other Aico mains powered units and features AudioLINK+ data extraction technology. It also includes dust compensation with a unique self-monitoring mechanism and an ease-fit base. The alarm has a 10-year life span. Please note that when purchased as part of the eco-fit range, this product does not include ease-fit bases, screw packs, or dust covers.