We always hear customer feedback the tv box is very hot and hot during ! The normal of the tv box does not have a cooling fan, there is only a small heat sink, when the playback box is playing for a long time, the CPU temperature will continue to increase, the highest temperature may even reach 60-70, then this will video freezes, or stop working, etc., and the life of will be shortened. the cooling fan to match the tv box. It can control the temperature of box. We have done test experiments. Using the cooling fan, box plays for one day. The -in CPU of always maintained at 40 -50. If it is used for a long time, it will not freeze, freeze, and the CPU will not be damaged. It is helpful for extend the life of ! RPM: 1200 Noise: 18 Cooling : cooling USB interface: 1 Colour:black Material:plastic Package Contents: 1 Set x Top Box Cooling Fan Only the above package content, other products are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.