Two cores:Industrial-grade turbofan(4200RPM)+ combined sealed foam, creating a powerful cooling effect, and it is 360-degree undifferentiated cooling, no matter where the cooling hole of your laptop is, the same cooling effect can be obtained Infinitely variable speed:The speed adjustment range of the fan is 0-4200 Rpm, which can meet different cooling needs. It can be adjusted to the best speed for you in office, game, and standby mode. Friendly treat the rear exhaust gaming laptops:The bottom air intake design completely eliminates the heat backflow problem of the rear exhaust laptops. Super adaptability: The combined sealed foam can be used according to the size of the laptop to obtain the best cooling effect. It is suitable for 13-17.3 inch laptops. Choose carefully for noise-sensitive users: GT500 is a well-deserved performance monster. so its noise can reach 55 dB at the highest speed. Peoples normal conversation is about 50dB.