The promotional HC-SR04 ultrasonic module Ultrasonic ranging module
The main technical parameters:
1, using voltage: DC5V 2: static current: less than 2 ma
3, high level output: 5 v
4, level output: 0 v
5, induction Angle: no more than 15 degrees
6, detection range: 2 cm - 450 cm
7,high precision: up to 0.3 cm