Cooling fan
1.Size:172x150x51(mm)
2.Frame:plastic UL94V0
3.Motor protection:Impedance protected,Reverse polarity protect

bathroom exhaust fan:

1.Size:172x150x51(mm)
2.Frame:aluminium   

3.Bearing: sleeve/1 ball 1 sleeve/ 2 ball

4.Rated voltage:12V/24V/48V

5.Motor protection

  a.Impedance protected

  b.Reverse polarity protedcted

  c.Automatic restart

6.low noise ; long operating life ; reliable performance;comply with all the relevant certification.

7.Cooling fan is more detailed information please refer to the chart: