GSI Quality Wireless Indoor IR Motion Detector With High Output Alarm Siren/Chime - Anti Intruder Security Device Multi-Featured Alarm Mounts On Wall Or Desktop - Plug In Directly To Outlet Point Head Of Motion Detector To The Desired Protected Area Upon Detecting Movement Or Motion, Wireless IR Sensor Triggers 100 dB Alarm Can Also Be set To Sound A Pleasant Chime Instead Of Piercing Alarm Noise Ideal For Protecting The Valuables In The Home Or Protected Areas