Description• Detectable ranges from 4cm to 500cm• URM04 v2.0 ultrasonic sensor• Module using RS485 bus communication• 1 cm resolution• Input voltage: 5VDCThe  URM04 v2.0 Ultrasonic Sensor allows you to determine the exact distance of an obstacle in the sonar field of view. The cleverness of your robot will depend on a sensitive sensor similar to the one bats use to know their position and track