1. Easy access to all ports - , audio/video, USB and Ethernet port cutouts, as well as USB-C connector and microSD card access. Special design makes it easy to insert/remove SD cards.2. Excellent heat dissipation performanceDouble cooling Has a strong heat dissipation performance, and the for model B board works, no longer worry about overheating.3. 9-layer acrylic shell designed for Model B that does not block the Wifi or Bluetooth signal of the for Pi Make your for Model B motherboard safer and better.The transparent case makes it easy to observe the internal state, and the pi board works to check that all electronic components are working properly.Installation : Start without disturbing the order, take it off from the third floor, place the motherboard on the third floor, and stack the rest one by one.colour:blackMaterial:Acrylicsize:The heat sink dimensions are: 14x14x6mm,14x9x5mm,9x9x5mmPackage Contents:1 * for Model B 9-layer acrylic shell1 * cooling fan3 * black aluminum radiator1 * screwdriver4 * screws(shipped without for raspberry pie motherboard)note:1. This case is designed for the for . Not compatible with other for models.2. Remove the protective film from the outer casing before assembly. And follow the instructions or videos to make it is installed in the right way.3. This package does not include the for Model B board.Only the above package content, other products are not included.Note: Light 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.