Features: 1. In the manual mode, the fan speed can be controlled manually by the manual adjustment knob, which is not comparable to the speed regulation of several gears. 2. Over-speed motor: It adopts double-ball high-power cooling fan, which can operate effectively with high power for a long time. It will not affect the life of turbofan due to incoming dust. It has the advantages of ultra-quiet, high operation, large wind, etc. The measured temperature drops by 20-30 °C. 3. Anti-skid device: Super anti-skid coefficient, anti-slip effect on both sides, firm, simple and intimate. 4. New look: use a variety of game carving elements. Create a colorful cooler with a cool concept. 5. User-friendly design: Each radiator is equipped with 3 kinds of air guiding sleeves, which can be compatible with laptops with different cooling ports on the market. 6. The fan switch can be automatically adjusted according to the temperature of the notebook (the temperature will be too high and will be turned off smoothly). Specifications: Material: ABS Color: black Fashion speed: 2000-4100RPM Rated voltage: 5V Rated current: 0.4±10%A Input power: 2W Size: 110 * 76 * 38 mm / 4.3 * 3.0 * 1.5in Weight: Approx. 201g Package List: 1 * Cooler 3 * Air Duct 1 * Power Cord 1 * Hush Pipe 1 * Spile 1 * Sticker