Features: Excellent heat dissipation effect: This product is equipped with a heat dissipation fan and an Acrylic protective cover effectively reducing the working temperature for RPI5 mainboard, improving stability and performances Easy installation: The product design is compact and easy to install, allowing users to quickly install it on the for RPI5 mainboard without the need for additional tools. Acrylic material： it has good heat dissipation performances and durability, providing reliable protections for the mainboard. Quiet operation: The cooling fan adopts a quiet, which reduces the noise during operation and does not interfere with the user experience Home DIY projects, school experiments, IoTs development, embedded system design, etc. Specifications: Material: Acrylic Size: approx 100x71mm/3.94x2.79in Types：A Case Only/ B Case with Cooling Fan/ C Case with Cooling Fan 4PCS Heatinks/ D Case with Cooling Fan 5PCS Heatinks Package Includes: 1Set Heatsink Case for RPI5 note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Does not include OrangePi 5 5B Board