This is a very simple single-layer case with a black fan.It contains 4 aluminum heat sinks and 4 heat sinks, a screwdriver.It is very easy to assemble and it has a beautiful appearance.The brown shell makes the entire Pi very stylish, understated and luxurious. Features Easy to assemble Super Quiet Fan Aluminum Heat sinks Thermal Tape Screw Driver Brown Acrylic Layer Simple but stylish