1、When the module detects obstacles signal, red indicator lights on and OUT port continuous outputs low voltage level signals at the same time 2、Detection distance can be adjusted with potentiometer, clockwise to increase and counterclockwise to reduce 3、Target reflectivity and shape is the key point of detection distance. Small and black objects have minimum detection distance, while large and white ones have maximum distance 4、Output port can be directly connected to the SCM IO port, also can drive a 5V relay module or buzzer module directly 5、Widely used in robot obstacle avoidance, car obstacle avoidance, assembly line counting and black white line tracking Description: Features: Detection distance can be adjusted with potentiometer, clockwise to increase and counterclockwise to reduce. Target reflectivity and shape is the key  point of detection distance. Small and black objects have minimum detection distance, while large and white ones have maximum distance. Output port can be directly connected to the SCM IO port, also can drive a 5V relay module or buzzer module directly. Widely used in robot obstacle avoidance, car obstacle avoidance, assembly line counting and black white line tracking. Specifications: Working Current: >1A Detection Distance: 2~60cm Detection Angle: 35° Size: Big Board: 42*38*12mm Small Board: 25*12*12mm Mounting Hole Diameter: 3mm Note: 1, Do not put probe toward sunlight. Sunlight will cause interference to module. 2, Sensitivity should not be regulated excessively high because high sensitivity can easily lead to false trigger. Package Includes: 1 x Infrared Tracking Module Set