ELECFREAKS PlanetX Ultrasonic Sensor

When the ultrasonic signal from the ultrasonic sensor hits an object, it will form a reflected echo. You can use it to judge the road conditions ahead in time when you remotely control the car. 

Specifications

Connections: RJ11 4P4C
Power: 3.3V
Connections type: Digital output

You can find the introduction of this product following this link

https://wiki.elecfreaks.com/en/microbit/sensor/planet-x-sensors/Plant_X_EF05007