[Update] shell cover Compatible with for 5 Pro development board.Made of metal case protect and cool your board, Reduced temps and evens out temperature increases under load. [High Quality] Metal material and shell opening design , Facilitate the expansion of ports. which is more conducive to the distribution of hot air. GPIO cable holes and SSD card slots are reserved. [Better Cooling] slotted design to maximize the area in contact. The overall heat dissipation effect is achieved through the silicone heat transfer adhesive and the chip paste.Add a cooling fan design and a heat dissipation hole on the side of the housing. [Fan Cooling] Cooling fan provide well passive cooling. Allows the motherboard to run the fan at exactly the necessary speed, which ensures the required cooling. Fan is quiet so it 't disturb your work and entertainment. Note:Due to different production batches, the appearance is different, which does not affect the use. Type:Only case,Without Antenna Colour:Black Material:Aluminum alloy Package Contents: 1 x Metal Case Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.