The Ajax EN54 FireProtect (Smoke) Jeweller is a wireless smoke detector without a built-in siren, designed for use in EN 54-compliant fire alarm systems. It operates using the Jeweller radio protocol with encrypted two-way communication and offers a wireless range of up to 1,700 m in open space. An optical dual-spectrum smoke sensor with a patented smoke chamber ensures reliable smoke detection while minimizing false alarms caused by steam.