JSN-SR20-Y1 ultrasonic ranging module can provide non-contact distance sensing function of 2cm-500cm.; The module adopts high-performance processors and high-quality components, making the product stable and reliable, with a long service life.; The module adopts an industrial grade waterproof and dustproof ultrasonic transducer with strong adaptability to the working environment.; There are many different output modes, and it is a high-performance, highly reliable commercial grade functional module with simple operation.; Compatible with all MCU work on the market. The usage of mode 0 is compatible with the HC-SR04 module.