The Me Ultrasonic Sensor V3.0 is the improvement version of Me Ultrasonic Sensor V2.0, better quality and perform more stable.Me Ultrasonic Sensor can be used to measure distance or obstacle avoidance, from 3cm to 4m. With the Arduino library we provide, users can get the distance directly and use the module easily.Features:Comes with Arduino library for easy programmingOver-current protectionEasy wiring with 6 Pin RJ25 interfaceLabeled with yellow tag and compatible with Me Base Shield and Me Baseboard2.54mm breakout pins for connecting with jumper wires16mm interval M4 mounting holes, compatible with Makeblock beamson board indicator LEDs for debugging and feedbackDetecting range: 3cm~4m, best in 30-degree angle