Description: This module is designed for smart car, robot and automated machine; It provides a kind of multifunction infrared detective system for the auto-machine; This module adopts infrared transmitter , receiver and components as a detector. A Smart car or robot hunt (including black and white lines), walking along the black line path, also known as tracing. Smart car to avoid the cliff, anti-fall; to avoid obstacles Can be applied to other automation applications photoelectric reflex. Specification: Material: Plastic Color: Multi-color Operating voltage: DC 3.3V-5V Working current: try to choose more than 1A power supply Operating temperature: -10 ℃ - +50 ℃ Mounting hole: M3 screw Detection distance: 1mm to 60 CM adjustable, the closer the performance of the more stable, the fastest distance from the white reflection. Size(LxWxH): Approx. Medium Control Board: 42×38x12mm/1.65x1.50x0.47inch; Small plate forward 25x12x12mm/0.98x0.47x0.47inch Package Includes: 5 pieces Medium Control Boards 20 pieces Small Plate Forward 5 pieces DuPont lines Note: Pls allow an error of 1-3mm due to the difference of manual measurement.