---
uid: input-system-custom-devices
---

# Custom devices

Extend the Input System with devices and input sources that Unity does not provide out of the box.

Send low-level input events into the runtime, or implement a custom Device with layouts, state, and registration. Use **Input events** when you need to inject or observe raw input; follow **Create a custom device** when you integrate a third-party API or replace HID fallback behavior.

| **Topic** | **Description** |
| :--- | :--- |
| **[Input events](input-events.md)** | Listen for, create, record, and process low-level input events for custom devices. |
| **[Create a custom device](create-custom-device.md)** | Walk through state struct, Device class, update, registration, and optional commands. |

## Additional resources

- [Layouts](layouts.md)
- [Human Interface Device specification](hid-specification.md)
- [Debug layouts](debug-layouts.md)
- [Devices (scripting)](devices-scripting.md)