This surface-mounting housing backbox is made from durable polycarbonate, ensuring long-lasting protection for your intercom and access control systems. Compatible with the D1101V model and other models in the D11x, D21x, and D31x series, it supports various configurations including call buttons, keypads, fingerprint readers, and displays. Perfect for residential, multi-tenant, and commercial applications, this housing offers reliable and versatile installation options. Upgrade your system with this sturdy and adaptable backbox today.