1. Shield Yourself From Radio Frequency Signals And Prevent External Radio Frequency Interference Signals From Affecting Yourself. 2. Microwave Shielding Box, Die-Cast Aluminum Box 3. Cnc Processing, Shielding Box, 4. Low Noise Amplifier Box, Amplifier Housing 5. Power Amplifier Housing, Professional Rf Design, Sma Connector. Overall Dimensions (Excluding Connectors): 43x23x16mm (Box Cover 2,Mm) Cavity Size (Mainly Pcb Version): 35x19x6mm Recommended Size Of Circuit Board: 33x17mm (Thickness 1mm) Connector Model: Sma-Kfd46 Colour:black Material:Aluminum alloy Package Contents: 1 x Shielding Shell Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use 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.