DeltaBell X external bell module (FPDELTAX3MOD) is a wired Grade 3 external alarm sounder module for domestic and commercial intruder alarm systems. It combines a twin piezo siren with visual strobe and comfort LEDs, weatherproof housing and tamper protection for reliable external deterrence.

• Grade 3 / PD6662:2010 suitability; EN50131-4 compliant.
• 104 dB(A) twin piezo siren with panel-controlled cut-off (approx. 15 minutes max).
• Visual alarm — 10 ms strobe pulse at 1 Hz, flashing comfort LEDs; optional back-lit lightbox (LDR night-enable).
• 3-way tamper protection (lid/front/back) and engineer hold-off for servicing.
• Self-levelling mounting for uneven surfaces and internal NiMH backup battery for autonomous operation.

Typical use: external alarm warning device for Grade 3 intruder alarm installations in domestic and light commercial settings. Installer guidance: this product must be installed and commissioned by a suitably qualified installer in accordance with the official installation guide and current UK/EU standards. Dispose of internal battery in line with local regulations. For full electrical specs (quiescent current, alarm current, exact battery capacity and detailed dimensions) refer to the official datasheet/installation guide.

Compliance & safety: Designed to meet EN50131-4 and PD6662:2010 Grade 3 requirements. Follow manufacturer installation instructions and local regulations. UKCA/CE marking: refer to manufacturer documentation.