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Working voltage: DC 5V, static current: 5mA, total current work: 30mA. Working range: 25cm-4M, Operating frequency: 40KHZ, Detection angle: 70 degrees. Stable performance: this distance sensor small size, convenient to use, it can measure distance accurately, low voltage, low power consumption, stable performance. Application: widely used for horizontal distance measurement, obstacle avoidance, automatic control, safety, industrial control, etc. Waterproof: integrated into a wire-wrapped waterproof sensor, suitable for wet, rough measuring occasions. Working principle: with the IO port TRIG trigger measuring distance, a signal with high level for at least 10 µS is output. The module automatically sends eight 40 kHz rectangular signals and automatically detects if there is a return signal. If a return signal is present, via the E/O port of the high level Echo output, the duration of the high level is the time of the ultrasonic wave from transmission to return.