• Contains both a heat and electrochemical carbon monoxide sensor to provide heat and CO coverage in one alarm. • Mains powered with 10-year rechargeable lithium cell back-up • Add an Ei3000MRF module (89945) for wireless interconnection and data extraction • Compatible with other Aico mains powered units • AudioLINK+ data extraction technology • Heat or CO indicator on alarm head • Easy-fit base • 10-year life • 85dBA Alarm at 3m • Test/Hush Button • Compliant with BS 5446-2: 2003, BS EN 50291-1: 2010. Standard The Ei3028 Multi-Sensor Heat & Carbon Monoxide (CO) Alarm contains Aico''s tried and tested thermistor heat sensor and our proven electrochemical CO sensor.