Features: Unique open shell cover for OrangePi 3B development board with Cooling Fan Clear acrylic material, you can clearly see the technology behind the machine,easy acsses to all ports The transparent acrylic material provides a transparent view for OrangePI 3B, allowing you to visually inspectthe board and its components without opening theshell. This helps to monitorthe status of theboard or verify connections The acrylic shell provides reliable protectionsagainst dust, debris, accidentalcollisions, and minorimpacts. It helps to protect the circuit board from physical damage It securely holds the boardin place, providing easy accessto various interfaces and functions Specifications: Material: Acrylic for Case Color: Clear For OrangePi 3B Size: approx 10x7.1x4cm/3.94x2.8x1.57in Package Includes: 1PC x Acrylic Case 1PC x Cooling Fan 3PCS x Heatsinks 1PC x 256GB eMMC Module (not include OrangePi) 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.