Products must adhere to international electronic safety standards. Ensure the cooling fans are CE, FCC, and RoHS certified to guarantee chemical safety and electromagnetic compatibility. Check the USB interface type (USB-C is preferred for modern compatibility) and ensure the rated voltage is 5V. For durability, the bearing type of the fan is critical; hydraulic bearings offer a longer lifespan and quieter operation than sleeve bearings. Additionally, verify the maximum load capacity, which should be at least 10kg (22 lbs) to support heavy gaming laptops.