Metal Box For CM4 IO Board Type A Designed For Compute Module 4 IO Board Mini Computer Chassis, Robust And Dust-Proof, Nice Looking Tailored For Compute Module 4 IO Board: Easy To for CM4 Mini PC Precise Cut-Out With Clear Label: Each Cut-Out Is Completely Aligned With The Connector Cooling Fan Included: Comes With Cooling Fan, Combined With The Airflow Vent, Better Heat Dissipation Application Examples: Binocular Vision, PoE Powered Projects, Or Other Industrial Context Colour:black Material:metal Package Contents: 1 * Metal case (top and bottom) 1 * Screwdriver 1 * Fan-4010-PWM-12V 1 * Screws pack Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.