Feature:1. SUPPORTED DATA MODE: The expansion board protective case supports all mainstream data modes such as D STAR, C4FM, DMR, P25, etc., has a wide range of applications.2. SUPPORTED SYSTEM: Support for Linux, for Windows, for Android system, onboard antenna (support extended external antenna), with good compatibility.3. ALUMINUM ALLOY: The protective shell is made of aluminum alloy, which is light in weight and wear resistant, not easy to deform or corrode after long term use.4. WITH RESERVED HOLE: The aluminum alloy enclosure has reserved holes, which can easily install expansion boards without affecting the use effect.5. EASY TO INSTALL: Equipped with screws, this protective case is compact and easy to install and remove, providing good protection for expansion boards.Specification:Item Type: Protective CaseProduct Color: BlackProduct Material: Aluminum AlloyWorking Frequency: U Band Amateur FrequencyApplication: For Raspberry Pi Zero W.Package List:1 x Black Aluminum Alloy Shell