Ajax FireProtect 2 AC (Heat/Smoke) Jeweller is a mains-powered combined smoke and heat detector with a built-in 85 dB siren and non-replaceable backup lithium cell. It uses a dual-spectrum optical smoke sensor plus two Class A1R thermistors and HazeFlow 2 filtering to reduce false alarms from steam and cooking fumes. The device communicates securely with Ajax hubs via the Jeweller encrypted frequency-hopping protocol, supports hub-initiated and local fallback interconnection, and can sound local alarms autonomously if not connected to a hub.

• Dual‑spectrum optical smoke sensor (blue + IR) with HazeFlow 2 for reduced false alarms.
• Two Class A1R thermistors; alarms at >+64°C or rapid rise ≥10°C/min.
• Mains-powered 110–240 V~, 50/60 Hz with non-replaceable CR‑2/3AZ backup cell; mains consumption up to 2 W.
• Built-in siren — 85 dB at 3 m — plus LED indication and distinct tones for alarm/fault/power.
• Jeweller wireless (GFSK), encrypted, frequency hopping; open-space radio range up to ~1,700 m; ERP up to 20 mW.
• Interconnect: hub-initiated multi-device alarm (~20 s) and detector-to-detector fallback (~1 min) if hub is unavailable.
• Tamper protection (mounting and chamber) and device authentication to reduce spoofing risk.
• Dimensions 122 × 122 × 54 mm; weight ~318 g. Colours: White or Black. Includes SmartBracket with WAGO terminals for safe mounting.

Use cases: residential and light commercial installations; ideal as part of a monitored Ajax system but fully functional as a standalone local alarm. Install in accordance with local codes and EN/BS standards; verify regional certification marks before sale/installation.

Safety & compliance: conforms to relevant standards (EN 54‑5 / EN 14604 / EN 50291 indicated in datasheet); follow official installation guidelines and wiring regulations. For monitored operation and full interconnect features, an Ajax hub and compatible firmware are required.