Segmentation by type distinguishes functional families within residential security and clarifies their relative market contributions. Intrusion Detection Systems—including door/window sensors and motion detectors—command the largest share, roughly 45%, as they form the baseline protection layer and benefit from low entry cost and easy retrofitting. Video Surveillance—encompassing indoor cameras, outdoor cameras, and doorbell cameras—accounts for about 30% of revenue, reflecting consumer preference for visual verification and the premium pricing of high‑resolution, AI‑enabled models. Access Control solutions, such as smart and biometric locks, represent approximately 15% of the market; they attract customers seeking convenience and enhanced entry authentication, often bundled with mobile app ecosystems. Environmental Monitoring—covering smoke, carbon‑monoxide, and flood sensors—makes up the remaining 10%, driven by regulatory mandates and the growing convergence of safety and security functions in unified platforms. Each type contributes distinct cost structures and growth dynamics, collectively defining the market’s composition.