... Infrared detector Long controll distance Yahee's Home Security Motion Sensor Alarm with 2 Remote Control,YCS105A Trade Manager: cnyaixun DescriptionWireless, infrared detector ... ) Note: 10 meters range for detection, after you arm the system, it takes 20 seconds for it to be on guard ... re-send for sometimes our mail servers have errors. Home Security Motion Sensor Alarm with 2 Remote Control,YCS105A