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# ControlParams interface
Standard `gtag.js` control parameters. For more information, see [the GA4 reference documentation](https://developers.google.com/gtagjs/reference/ga4-events).
Signature:
```typescript
export interface ControlParams
```
## Properties
| Property | Type | Description |
| --- | --- | --- |
| [event\_callback](./analytics.controlparams.md#controlparamsevent_callback) | () => void | |
| [event\_timeout](./analytics.controlparams.md#controlparamsevent_timeout) | number | |
| [groups](./analytics.controlparams.md#controlparamsgroups) | string \| string\[\] | |
| [send\_to](./analytics.controlparams.md#controlparamssend_to) | string \| string\[\] | |
## ControlParams.event\_callback
Signature:
```typescript
event_callback?: () => void;
```
## ControlParams.event\_timeout
Signature:
```typescript
event_timeout?: number;
```
## ControlParams.groups
Signature:
```typescript
groups?: string | string[];
```
## ControlParams.send\_to
Signature:
```typescript
send_to?: string | string[];
```