FireProtect 2 (Heat/Smoke/CO) Jeweller is a wireless fire detector with a built-in siren. Designed for indoor installation. Detects smoke, temperature rise, and dangerous CO (carbon monoxide) level. It is available in two modifications: with sealed batteries (has SB in the name) that run up to 10 years, and with replaceable ones (has RB in the name) that run up to 7 years.