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HC SR 04 Ultrasonic Distance Sensor Module ESP32 Node MCU Development Board with Wifi and Bluetooth (CP2102 Driver ~30 80 ms (close) Coil Class ~30 80 ms (close) Coil Class Class F Insulation (155 degreesC) Protection Rating IP65 (dust tight 000 fingerprint templates directly in the module's built in flash memory GND (4 pin header) Board Dimensions 45 mm x 20 mm x 15 mm (approx This entire measurement cycle completes in under 25 milliseconds
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