1.Adopts TCRT5000 photoelectric sensor and comparator. 2.Easy to use, good stability and anti-interference ability. 3.Perfect for black & white line detection for smart car. 4.Black line for low level output, white line for high level output. 5.Operating Voltage: 5V. 6.Board Size: Approx. 35 x 10 mm. 7.Color: Black.