Ajax DoorProtect U is a compact wireless magnetic contact for indoor door and window protection. Designed for professional and residential intrusion systems, it uses the Jeweller two‑way encrypted radio protocol to report events to an Ajax Hub and connected monitoring/CMS platforms.

• Wireless Jeweller two‑way radio with encrypted communication — long open‑space range.
• Sealed dual reed relays and two magnet sizes (big & small) for flexible mounting and reliable opening detection.
• Connector for third‑party NC wired detector (external device not powered by DoorProtect U).
• Pre‑installed CR123A battery with up to 7 years typical battery life (10 cycles/day, 60 s polling).
• Tamper detection via SmartBracket and physical screw for secure mounting.

Suitability & compliance: Requires an Ajax Hub (sold separately) and integrates with Ajax apps, range extenders and PRO monitoring. Warranty: 2 years. Follow local regulations and installation best practice; for commercial or mains‑powered alarm systems consult a qualified installer. Check device labelling or datasheet for specific regulatory marks (CE/UKCA) for your region.