This product may consume the energy of the for NS2 host battery and also has a heat dissipation function. 2. This product is equipped with a cooling fan, and the fan's gear mode is a cyclic change mode. After the product is powered on, it will directly change to the high-speed gear, and then change through four gears in sequence: high speed - medium speed - low speed - off, operating in a cyclic manner. 3. The fan gear is equipped with a gear indicator light. When change to the corresponding gear, the indicator light turns blue, and when turned off, the indicator light goes out. Product parameters Input: DC 5V/150mA Model used: for switch 2 Interface Type: Type-C Product weight :63g Material: abs Packaging list: Fan x1