The popular HC-SR04 ultrasonic distance module provides an easy way for your Arduinoâ„¢ to measure distances up to 4.5m. Use it to add obstacle avoidance to your next robotics project or mount it on a servo to create your own ultrasonic SONAR!
•   Uses just two digital pins
•   Operating Voltage: 0.5V
•   Sensor Angle: <15 degrees
•   Detection Distance: 2cm – 450cm
•  Sensor IC : HC-SR04
•   Dimensions: 45(W) x 20(D) x 13(H)mm