"220V AC Cooling Fan" is a necessary procedure, hot summer. Weather kick your ass feel today? Cooling fan out your pockets, let the breeze from your speakers elusive comfort you! Suction fan selection: 1. Less noise. 2. The fan itself must be less negative, the weight of the fan must not be too heavy! There leaf blades and so on ten million seats must not be too heavy! To select a relatively light weight parts, in order to avoid excessive motor power law affect the motor causes the motor to premature aging!