Features: 1. The Radiator Is Made Of Aluminum Alloy, Which Has Excellent Heat Absorption And Thermal Conductivity. It Is Equipped With A High-Speed Silent Fan And Fast Convection Air Intake, Which Can Quickly Dissipate Heat And Effectively Protect The Motherboard. 2. Integrated Radiator, Strip Design Increases Heat Dissipation Area, Equipped With 3510 Silent Cooling Fan, Increases Convection Air Intake, Improves Cooling Efficiency, And Protects The Motherboard. 3. Special Radiator For 4b, Precise Hole Position, Easy To Install 4. The Product Does Not Contain The Motherboard, Only The Radiator Fan And Casing. 5. Convenient To Carry And Easy To Use Description: 1. Type: Aluminum Alloy Shell 2. Power Supply Voltage: 5V 3. Model: for 4B Shell Note: Does not include motherboard Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Material: Aluminum alloy colour: Black Package Contents: 1 x Radiator Shell Only the above package content, other products are not included. Note: Light reflection 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.