This ultrasonic ranging module is a non-contact distance sensing module and having the feature of high performance and cost-effective. Measuring range is 0.02 ~ 4.00m, measurement accuracy is 0.5cm. When it works,it does not contact with the measured object directly,and it could show the results of measurement clearly. Specifications: 1 Detecting Range: 2cm - 4m ; 2 Supply Voltage: DC 5V - 12V; 3 Working Current: 3mA; 4 Resolution: 1 mm; 5 Ultrasonic Frequency: 40kHZ; 6 Measuring angle: 30 degree; 7 Output: Switching output; 8 Operating temperature: -10°C - 60°C; 9 Storage temperature: -20°C - 80°C; 10 Size: 46mm X 19mm X 15mm;