1. The first gear is about 2.5m/s, and the use is about 5H;
2. The second gear is about 3.0m/s, and the use is about 4H;
3. The third gear is about 3.5m/s, and the usage is about 2.5H.
* There are metal cooling patches on both sides of the product, which can provide a cooling experience on the skin without any cooling effect.
