Advanced Optical Technology: This sensor module features a slot-type p oelectric sensor with an infrared LED and an NPN p otransistor, ensuring precise speed and distance measurements. The 5.9mm slot accommodates various non-transparent objects to trigger TTL low-level outputs. Stable Output with Schmitt Trigger: Equipped with a Schmitt trigger, this module effectively eliminates pulse jitter, providing a stable and reliable digital output for critical applications in robotics and automation. Versatile Power Compatibility: Operating efficiently on a voltage range from 3.3V to 5V, this module offers flexible integration with various microcontrollers and systems, including Arduino, through its digital switching output (0 and 1). Arduino Integration: Designed for seamless compatibility with Arduino platforms, this module requires the MCU's I/O port to be set to input mode, ensuring smooth operation and effective communication. Color: Blue & Black Material: plastic Package Contents: 10PCS IR Infrared Sensor Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.