The RAIN Alliance promotes the use of ISO/IEC 18000-63 air-interface protocol (also known as GS1 UHF Gen 2). To learn more about these standards, you can purchase ISO/IEC 18000-63 from AIM or your ISO National Body organization. You can also download GS1 UHF Gen 2 here.

A RAIN system is a wireless system where the tags and readers both implement the RAIN air-interface protocol and the tags are encoded utilizing controlled numbering practices either following applicable ISO standards or the GS1 EPC TDS.

In simple terms, RAIN is a technology that uses a reader to read and write a tagged item, manage the data, and take action. This enables businesses and consumers to identify, locate, authenticate, and engage with every item with a RAIN  tag. RAIN provides rich, real-time data and insights for various applications including inventory management, asset tracking, and supply chain optimization across many industry sectors.