ITEM NAME:Ultrasonic Module HC-SR04 Distance Measuring Transducer Sensor for Arduino #gib Store Home Promotion Hot Item Add to Fav.The out pin of this module is used as a switching output when anti-theft module, and without the feet when ranging modules. Detecting Distance: 2-450cm. Sensor Angle: ≤15 degree. 1 X HC-SR04 Module. Toys, Hobbies.