& Exp. Product Image. You can conveniently to let the light auto on/off .The switch can detect human body's infrared, and use infrared to control the load. Limited Time Sale Easy Return. 99. 4.1 out of 5 stars 374. This results in unnecessary power wastage. AC 220V Sound Voice Sensor Intelligent Auto On Off Light Switch Delay Time. LM35 sensor as a fan switch with indoor temperature input, when the room temperature is getting higher then the speed of the fan is also getting higher, and vice versa. 2pack 12V 10A LED Auto On Off Street Photocell Light Switch Photo Control Sensor 5 out of 5 stars (2) 2 product ratings - 2pack 12V 10A LED Auto On Off Street Photocell Light Switch Photo Control Sensor Free delivery. FREE Delivery on your first order shipped by Amazon. £16.99 . AUTOMATIC HUMAN MOTION Sensor Detector Switch, LED Lamp Light Auto On Off #4 - $20.29. Such Automatic Room Lights can be implemented in your garages, staircases, bathrooms, etc. Co., Ltd. Reduced Price. 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