The Ajax EN54 FireProtect (Sounder/VAD) Jeweller is a wireless combined acoustic and visual alarm device designed for EN 54-compliant fire alarm systems. It operates using the Jeweller radio protocol with encrypted two-way communication and provides a wireless range of up to 1,700 m in open space. With an acoustic output of up to 100 dB and a high-intensity LED visual alarm, it ensures clear audible and visual alarm notification for both indoor and outdoor applications.