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J-Series/J2/README.md

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+# Keychron J2 - Hardware Design Files
+
+> 75% QMK wireless mechanical keyboard with 2.4 GHz, Bluetooth, and USB-C wired connectivity.
+
+**Product page:** [Keychron J2 QMK Wireless Mechanical Keyboard](https://www.keychron.com/products/keychron-j2-qmk-wireless-mechanical-keyboard)
+
+![Keychron J2](https://cdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron-J2-QMK-Wireless-Mechanical-Keyboard-1.jpg?v=1757405687)
+
+## Specifications
+
+| Spec | Detail |
+|---|---|
+| Layout | 75% |
+| Connectivity | 2.4 GHz / Bluetooth / USB-C wired |
+| Firmware | QMK / Keychron Launcher |
+| Hot-swap | Yes, depending on version |
+| Case Material | ABS plastic |
+| Keycaps | Double-shot PBT |
+
+## Included Files
+
+| File | Description |
+|---|---|
+| `J2_US_Bottom_Case_20260708.stp` | US bottom case 3D CAD model |
+| `J2_US_Full_Model-20260708.stp` | US full keyboard 3D CAD model |
+| `J2_US_PCB_20240725.dwg` | US PCB 2D CAD drawing |
+| `J2_US_Plate_20260708.dwg` | US plate 2D CAD drawing |
+| `J2_US_Plate_20260708.pdf` | US plate reference drawing |
+| `J2_US_Top_Case_20260708.stp` | US top case 3D CAD model |
+
+## Downloads
+
+> **Download note:** If a download link does not respond, copy the link and paste it directly into your browser's address bar. All links below are hosted on Keychron's official server and are safe to use.
+
+| File | Download Link |
+|---|---|
+| `J2_US_Bottom_Case_20260708.stp` | http://www.keychron.co:34568/keychron-github-assets/Keychron-Keyboards-Hardware-Design/J-Series/J2/J2_US_Bottom_Case_20260708.stp |
+| `J2_US_Full_Model-20260708.stp` | http://www.keychron.co:34568/keychron-github-assets/Keychron-Keyboards-Hardware-Design/J-Series/J2/J2_US_Full_Model-20260708.stp |
+| `J2_US_PCB_20240725.dwg` | http://www.keychron.co:34568/keychron-github-assets/Keychron-Keyboards-Hardware-Design/J-Series/J2/J2_US_PCB_20240725.dwg |
+| `J2_US_Plate_20260708.dwg` | http://www.keychron.co:34568/keychron-github-assets/Keychron-Keyboards-Hardware-Design/J-Series/J2/J2_US_Plate_20260708.dwg |
+| `J2_US_Plate_20260708.pdf` | http://www.keychron.co:34568/keychron-github-assets/Keychron-Keyboards-Hardware-Design/J-Series/J2/J2_US_Plate_20260708.pdf |
+| `J2_US_Top_Case_20260708.stp` | http://www.keychron.co:34568/keychron-github-assets/Keychron-Keyboards-Hardware-Design/J-Series/J2/J2_US_Top_Case_20260708.stp |
+
+## Opening the Files
+
+| Format | Free Software | Commercial Software |
+|---|---|---|
+| `.stp` | FreeCAD, Onshape | Fusion 360, SolidWorks |
+| `.dwg` | LibreCAD (limited), QCAD | AutoCAD, DraftSight |
+| `.pdf` | Any PDF viewer | - |
+
+## Links
+
+- [Product Page](https://www.keychron.com/products/keychron-j2-qmk-wireless-mechanical-keyboard)
+- [Main Repository](https://github.com/Keychron/Keychron-Keyboards-Hardware-Design)
+
+## License
+
+This project is **source-available**. Personal and educational use is allowed, and commercial use is allowed for original compatible accessories within the limits of the license.
+
+**You may not use these files to copy, manufacture, sell, or distribute Keychron keyboards or mice, or substantially similar products, and you may not use Keychron trademarks as your own branding.**
+
+See the [LICENSE](../../LICENSE) for full terms.