The Light (Lux) Sensor Controller works with all RF type Motolux motors or RF receiver units. The sensor is attached to the inside of the window glass where it measures the intensity of the outside sunlight, whilst not obstructing the opening and closing of the window. The Light Sensor is able to control one motor or one group of motors, which will all operate simultaneously.  It has a built in rechargeable lithium battery, built in solar panel, a LCD display and can be turned off when not in use. It provides separate Summer and Winter modes of operation, to reverse the automatic opening and closing of the window covering product across the different seasons.