Smart Home Alarm Systems / Smart Home Alarm Accessories Smart Home Alarm Accessories Wide range of accessories. You can extend up to 40 accessories for your Hub. SR-PIR/PIR Motion Detector SR-PETPIR/ Pet Friendly PIR Detector SR-PC/ PIR View Camera SR-PVC / PIR Video Camera SR-SR / Internal Siren SR-BX-SARI / External Siren SR-SD / Smoke Detector SR-EIR / External Motion Detector SR-DC / Door/Window Contact SR-KP / Keypad SR-PB / Panic Button SR-PS (EU) / Smart Plug SR-KF / Key Fob SR-RS / Room sensor