The Line Tracking Sensor 5 Channel Module uses 5 TCRT5000 Infrared Line Tracking sensors with an onboard comparator, LED indicators and other signal conditioning components. Because of the 5 mounted sensors, you don't need to worry about detection speed. Also, it has an anti-interference feature. This feature prevents visible light from getting in the way of line detection. Further, the TCRT5000 is a reflective sensor that includes an infrared emitter and a phototransistor in a package filled with lead. Lead also blocks visible light. It has indicator LEDs that trigger when a line is detected.