Merrytek (MC054V) daylight sensor compatible with Attica Linear LED System. The integrated motion sensor is adjusted for 2-step and 3-step dimming. The daylight sensor is integrated on the LED mounting rail and provides dimming functions according to the amount of natural daylight. The user adjusts the brightness level of the LED fitting to better light level and more economy in the electricity bill. OPERATING CHARACTERISTICS Operating voltage 120~277V AC, suitable to American market. Patented microwave antenna, mounting height is 15m Max, suitable to install in most of warehouses. Supports high-sensitivity and low-sensitivity modes (for metal ceilings, metal reflector mounting environments) Work with 1-10V dimmable LED driver, easy to achieve 2-step or 3-step dimming function. New patented remote control to adjust the launch angle to avoid misuse The microwave sensor will detect movement and switch the light on and off. Alternatively, the 2-step and 3-step dimming is available by setting the dip-switches on the housing of the sensor.