Hitachi setfree is high-grade. Hitachi as a century-old brand, Hitachi in the 1980s developed a scroll compressor for air conditioning, for the world of refrigeration opened a new chapter in the air conditioning mileage, and became one of the industry's leading brands of inverter multi-connected air conditioning systems, SET-FREE Smart series, the application of Japan's Hitachi cutting-edge cutting-edge technology to achieve a highly intelligent air solutions, as the first Hitachi 5G Intelligent IOT central air conditioner. Using AI (Artificial Intelligence) and big data analysis technology, together with the powerful Hitachi Smart Home APP, it provides a better service experience.