Key features

• •Please get the original ultrasonic sensor from" Ardess"! This is a really common sonar-type Ultrasonic Distance Sensor commonly used with Arduino's and raspbery microcontrollers, helping your robot avoid objects with few lines Arduino code.
• •This ultrasonic module is different from the parallax sensor in that it uses the 4 pin connection vs a 3 pin connection. If you use an arduino controller for this it's no problem.
• •The sensor boards are pretty well-built without solder joints and all pins are clearly labeled on the board silkscreen. Legs are compatible with breadboards so it's easy to use for quick prototyping
• •Cheaper alternative,great option for arduino projects!!I'd recommend these range sensors to anyone needing to sense distance for any of there Arduino projects.