10pcs Ultrasonic Module HC-SR04 Distance Measuring Ranging Sensor for Arduino

Description

Specification:
Using IO trigger for at least 10us high level signal
The module automatically sends eight 40 kHz and detect whether there is a pulse signal back
If the signal back, through high level ,time of high output IO duration is the time from sending ultrasonic to returning. Test distance = (high level time velocity of sound (340M/S) /2
Power supply :5V DC, quiescent current : <2mA,effectualangle: <15 ranging distance : 2cm~500 cm resolution : 0.3 cm
Package Content: 10pcs HC-SR04
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On Oct-01-17 at 22:09:08 PDT, seller added the following information: