We guarantee all our displays, modules, parts for two full years. During this time, we will replace or amend all our goods for free if there is something wrong with them. We provide lifetime maintenance and charge only for the raw materials. We provide technology training for free, which contains the operation and maintenance training of the LED screens in the factory. We also provide the operation manual, software, test report and so on. Any associated CAD drawing on how to fix up the display and some other expert suggestion will be provided.