Ultrasonic distance sensor module

Model: HC-SR04.
Ultrasonic distance sensor module.
The HC-SR04 is an affordable and easy to use distance measuring sensor which has a range from 2cm to 400cm (about an inch to 13 feet).
The sensor is composed of two ultrasonic transducers. One is transmitter which outputs ultrasonic sound pulses and the other is receiver which listens for reflected waves. It’s basically a SONAR which is used in submarines for detecting underwater objects. Can be mounted with the support AF114.
Specifications:
Operating voltage: 5 V DC.
Operating current: 15 mA.
Operating frequency: 40 KHz.
Min range: 2 cm.
Max range: 400 cm.
Accuracy: 3 mm.
Measuring angle: < 15°
Dimension: 45 x 20 x 15 mm.