Features: Crafted from good qualityy material, this case offer excellent durability and protectionfor your 3B+ mainboard. for 3B+, you can also use 3.5inch screen (optional) together with the case. Not completely closed, there are function hole, such as GPIO, camera, cooling fan. There is gap at the bottom of the cover, it help to reduce the blocking better heat dissipation. You can hangthe case on wall with the gap. The optional screen is 3.5inch 480x320 resolution TFT screen,touchfunction Perfect size Specifications: Size:approx 91x62x34mm/3.58x2.44x1.34in Material:ABS for 3B+ Optional Types: Only Case / Case with Cooling Fan/ Case with Display Screen 60frames Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Only Case / Case with Cooling Fan/ Case with Display Screen 60frames (Optional)