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Main Features 1,DC 5V Ultrasonic module HC-SR04 distance measuring transducer sensor . 2,Working Voltage: 5V(DC) 4,Static Current: Less than 2mA Specifications 1, Sensor angle: Not more than 15 degrees 2,Detection distance: 2cm-450cm 3,High precision: Up to 0.3cm 4,Mode of connection: VCC, trig(T), echo(R), GND