# speedVariation

> The speed variation (from zero to the variation) added to base speed to be applied.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.7/script-reference/unityengine.md)
* **Assembly:** UnityEngine.Physics2DModule

```csharp
public float speedVariation { get; set; }
```

### Remarks

A random value between 0 and `speedVariation` is used and added to the speed.  The `speedVariation` can be negative to randomly reduce the speed.

Additional Resources: [\_speed](/engine/6000.7/script-reference/unityengine/surfaceeffector2d/speed.md)