The Ajax EN54 FireProtect (Smoke/Sounder) Jeweller is a wireless smoke detector with an integrated siren, designed for 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, combined with a built-in siren up to 95 dB, ensures reliable smoke detection and immediate on-site acoustic alarm notification.