This is a non-contact distance measurement module, which is also compatible with electronic brick. It’s designed for easy modular project usage with industrial performance.FeaturesDetecting range: 3cm-350cm Best in 30 degree angle Electronic brick compatible interface 5VDC power supply Breadboard friendlyDual transducer Arduino library readyDocumentsPlease visit our wiki page for more info about this product. It will be appreciated if you can help us improve the documents, add more demo code or tutorials. For technical support, please post your questions to our forum.