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 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 Package includes: 1Set Heatsink Case for RPI5