Features: The TCRT5000 reflective tracking sensory module delivers high sensitivity for precise black/white detection and superior light esistance. Featuring wide 3.3V-5V and simple pin connection, this sensory seamlessly integrates with various microcontroller boards. Ideal for robotics enthusiasts, electronics engineers, and educators obstacle detection and automated navigation solution. Perfect for industrial automation, educational robotics projects, and home devices requiring tracking capabilities. Its optimized emitter/receiver configuration ensures stable in space constrained environment while maintaining millimeter level detection accuracy. Specifications: Size: Approx.96.4mm/3.79inch Working: 3.3V to 5V Package Includes: 2 Optional Package: Package 1 Include:1 Set Recognition sensory Package 2 Include:3 Set Recognition sensory note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.