The Ajax FireProtect 2 RB (Heat/Smoke/CO) is a wireless fire detector with heat, smoke, and carbon monoxide sensors that quickly detects threats and alerts users via a built-in 85 dB siren and Ajax apps. With replaceable batteries providing up to 7 years of operation and secure Jeweller radio communication, it integrates easily into Ajax security systems. Package contents: FireProtect 2 RB (Heat/Smoke/CO) Jeweller, SmartBracket mounting panel, installation kit (mounting accessories), 2× CR123A batteries (pre-installed), quick start guide.