The models are mainly different in the back. Generally speaking, there are three major series: M92, M52 and U61. However, there are many sizes, and there are also differences between flat and curved models. The third generation of Haier Alibaba TV fully supports 4K playback, and there are also many 4K video resources, combined with early childhood education resources and online video call functions. The modular technology realizes the intelligent upgrade of hardware, and the hardware does not have to worry about being outdated. You can go to the Haier counters in Suning Gome or Haier stores to experience it in person.