Updated 4 in 1 Professional Kit for Raspberry Pi 3 &Raspberry Pi 2 B &Raspberry Pi B+,black Sliced 9 Layers Case Box + Cooling Fan +micro USB Cable with Turn/on Switch ,Heatsinks Updated Raspberry Pi Sliced 9 Layers Case Box is perfectly compatible Raspberry Pi 3,Pi 2 and Raspberry Pi Model B+ and it Brand New and high quality, it is made of 9 individual layers and held together with 4 nylon bolts, so it requires no tools for easy assembly and disassembly.This case reserved fan port,so it could works better with cooling fan and aluminum heatsinks Micro USB cable with turn on/off switch ,so it is very convenient No need to pull the cable to restart or reboot your PI, just press the button to turn your Pi on and off two Aluminum heatsinks.there is stickness on the back of the heatsinks the mini fan could moves lots of wind, Please Notice:now we have updated the mini fan to reduce the nosiy (6000r/min),the fan is now 30*30*10mm , it will be a bit thick,make it inaceesable to install heatsink.So please install the fan outside of the case first.Now we are trying to improve the size of the fan.Please believe it will not take too long.