Feature:  

• Four pins: +5-volts, GND, output, and EN
• Two potentiometers on the module
• One controlling operating frequency (centred at 38 kHz) the other controlling intensity.
• A smooth white surface worked far better than a black or rough surface.
• It can induce a distance of 2 to 40 cm, with good anti-interference ability

Package Includes:  

1 x Infrared Obstacle Avoidance Sensor Module