Quick Overview 

1. Affordable Price
2. Operating Voltage: 5 V
3. Sonar Sensing Range: 2-400 cm
4. Max. Sensing Range: 450 cm
5. Frequency: 40 kHz

Product Description   

       This HC-SR04-Ultrasonic Range Finder is a very popular sensor which is found in many applications where it requires to measure distance and detect the objects.

         The module has two eyes like projects in the front which forms the Ultrasonic transmitter and Receiver.  The HC-SR04 ultrasonic sensor uses sonar to determine the distance to an object like bats or dolphins do.