One kind. Thor notebook is a well-known gaming notebook brand independently developed by Qingdao Raytheon Technology Co., Ltd. Its products are manufactured by the world's top notebook manufacturers. The letters TR are the abbreviation of THUNDEROBOT, which means Thor, so there is only one kind, and it is 100% reliable. Designed and manufactured by Blue Sky, the entire machine is imported to the mainland to ensure its authentic gaming notebook pedigree.