How to identify Tiny Cooling Fan pros and cons

1. Look "Tiny Cooling Fan" style.
2. Look at the "dota雷竞技 " Appearance: The appearance in addition to beautiful, but also paint and chrome is smooth, straight, no wrinkles, blade rotation should be smooth.
3. measure "dota雷竞技 " performance: see whether the key is turned Lee winded, shaking his head and timer test whether spiritual, accurate control, there is no difference in the wind, smooth blades, no noise, no leakage, temperature normal.