# @ohos.multimodalInput.inputDevice (Input Device) (System API)


The **inputDevice** module allows you to listen for hot swap events of input devices and query information about input devices.


> **NOTE**
>
> The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.
>
> This topic describes only system APIs provided by the module. For details about its public APIs, see [@ohos.multimodalInput.inputDevice (Input Device)](js-apis-inputdevice.md).


## Modules to Import

```js
import { inputDevice } from '@kit.InputKit';
```

## inputDevice.setKeyboardRepeatDelay<sup>10+</sup>

setKeyboardRepeatDelay(delay: number, callback: AsyncCallback&lt;void&gt;): void

Sets the keyboard repeat delay. This API uses an asynchronous callback to return the result.

**System capability**: SystemCapability.MultimodalInput.Input.InputDevice

**System API**: This is a system API.

**Parameters**

| Name    | Type  | Mandatory| Description                                                        |
| -------- | ------ | ---- | ------------------------------------------------------------ |
| delay    | number                    | Yes   | Keyboard repeat delay, in ms. The value range is [300, 1000] and the default value is **500**.|
| callback | AsyncCallback&lt;void&gt; | Yes   | Callback used to return the result.|

**Error codes**

For details about the error codes, see [Universal Error Codes](../errorcode-universal.md).

| ID | Error Message            |
| ---- | --------------------- |
| 401  | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified;2. Incorrect parameter types; 3. Parameter verification failed. |

**Example**

```js
try {
  inputDevice.setKeyboardRepeatDelay(350, (error: Error) => {
    if (error) {
      console.log(`Set keyboard repeat delay failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
      return;
    }
    console.log(`Set keyboard repeat delay success`);
  });
} catch (error) {
  console.log(`Set keyboard repeat delay failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}
```

## inputDevice.setKeyboardRepeatDelay<sup>10+</sup>

setKeyboardRepeatDelay(delay: number): Promise&lt;void&gt;

Sets the keyboard repeat delay. This API uses a promise to return the result.

**System capability**: SystemCapability.MultimodalInput.Input.InputDevice

**System API**: This is a system API.

**Parameters**

| Name   | Type    | Mandatory  | Description                                 |
| ----- | ------ | ---- | ----------------------------------- |
| delay | number | Yes   | Keyboard repeat delay, in ms. The value range is [300, 1000] and the default value is **500**.|

**Return value**

| Parameters                 | Description              |
| ------------------- | ---------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**

For details about the error codes, see [Universal Error Codes](../errorcode-universal.md).

| ID | Error Message            |
| ---- | --------------------- |
| 401  | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified;2. Incorrect parameter types; 3. Parameter verification failed. |

**Example**

```js
try {
  inputDevice.setKeyboardRepeatDelay(350).then(() => {
    console.log(`Set keyboard repeat delay success`);
  });
} catch (error) {
  console.log(`Set keyboard repeat delay failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}
```

## inputDevice.getKeyboardRepeatDelay<sup>10+</sup>

getKeyboardRepeatDelay(callback: AsyncCallback&lt;number&gt;): void

Obtains the keyboard repeat delay. This API uses an asynchronous callback to return the result.

**System capability**: SystemCapability.MultimodalInput.Input.InputDevice

**System API**: This is a system API.

**Parameters**

| Name    | Type  | Mandatory| Description                                                        |
| -------- | ------ | ---- | ------------------------------------------------------------ |
| callback   | AsyncCallback&lt;number&gt;                    | Yes   | Callback used to return the result.|

**Error codes**

For details about the error codes, see [Universal Error Codes](../errorcode-universal.md).

| ID | Error Message            |
| ---- | --------------------- |
| 202  | SystemAPI permission error |
| 401  | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified;2. Incorrect parameter types; 3. Parameter verification failed. |

**Example**

```js
try {
  inputDevice.getKeyboardRepeatDelay((error: Error, delay: Number) => {
    if (error) {
      console.log(`Get keyboard repeat delay failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
      return;
    }
    console.log(`Get keyboard repeat delay success`);
  });
} catch (error) {
  console.log(`Get keyboard repeat delay failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}
```

## inputDevice.getKeyboardRepeatDelay<sup>10+</sup>

getKeyboardRepeatDelay(): Promise&lt;number&gt;

Obtains the keyboard repeat delay. This API uses a promise to return the result.

**System capability**: SystemCapability.MultimodalInput.Input.InputDevice

**System API**: This is a system API.

**Return value**

| Parameters                   | Description                 |
| --------------------- | ------------------- |
| Promise&lt;number&gt; | Promise used to return the result.|

**Error codes**

For details about the error codes, see [Universal Error Codes](../errorcode-universal.md).

| ID | Error Message            |
| ---- | --------------------- |
| 202  | SystemAPI permission error |
| 401  | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified;2. Incorrect parameter types; 3. Parameter verification failed. |

**Example**

```js
try {
  inputDevice.getKeyboardRepeatDelay().then((delay: Number) => {
    console.log(`Get keyboard repeat delay success`);
  });
} catch (error) {
  console.log(`Get keyboard repeat delay failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}
```

## inputDevice.setKeyboardRepeatRate<sup>10+</sup>

setKeyboardRepeatRate(rate: number, callback: AsyncCallback&lt;void&gt;): void

Sets the keyboard repeat rate. This API uses an asynchronous callback to return the result.

**System capability**: SystemCapability.MultimodalInput.Input.InputDevice

**System API**: This is a system API.

**Parameters**

| Name    | Type  | Mandatory| Description                                                        |
| -------- | ------ | ---- | ------------------------------------------------------------ |
| rate    | number                    | Yes   | Keyboard repeat rate, in ms/time. The value range is [36, 100] and the default value is 50.|
| callback | AsyncCallback&lt;void&gt; | Yes   | Callback used to return the result.|

**Error codes**

For details about the error codes, see [Universal Error Codes](../errorcode-universal.md).

| ID | Error Message            |
| ---- | --------------------- |
| 202  | SystemAPI permission error |
| 401  | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified;2. Incorrect parameter types; 3. Parameter verification failed. |

**Example**

```js
try {
  inputDevice.setKeyboardRepeatRate(60, (error: Error) => {
    if (error) {
      console.log(`Set keyboard repeat rate failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
      return;
    }
    console.log(`Set keyboard repeat rate success`);
  });
} catch (error) {
  console.log(`Set keyboard repeat rate failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}
```

## inputDevice.setKeyboardRepeatRate<sup>10+</sup>

setKeyboardRepeatRate(rate: number): Promise&lt;void&gt;

Sets the keyboard repeat rate. This API uses a promise to return the result.

**System capability**: SystemCapability.MultimodalInput.Input.InputDevice

**System API**: This is a system API.

**Parameters**

| Name   | Type    | Mandatory  | Description                                 |
| ----- | ------ | ---- | ----------------------------------- |
| rate | number | Yes   | Keyboard repeat rate, in ms/time. The value range is [36, 100] and the default value is 50.|

**Return value**

| Parameters                 | Description              |
| ------------------- | ---------------- |
| Promise&lt;void&gt; | Promise used to return the result.|

**Error codes**

For details about the error codes, see [Universal Error Codes](../errorcode-universal.md).

| ID | Error Message            |
| ---- | --------------------- |
| 202  | SystemAPI permission error |
| 401  | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified;2. Incorrect parameter types; 3. Parameter verification failed. |

**Example**

```js
try {
  inputDevice.setKeyboardRepeatRate(60).then(() => {
    console.log(`Set keyboard repeat rate success`);
  });
} catch (error) {
  console.log(`Set keyboard repeat rate failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}
```

## inputDevice.getKeyboardRepeatRate<sup>10+</sup>

getKeyboardRepeatRate(callback: AsyncCallback&lt;number&gt;): void

Obtains the keyboard repeat rate. This API uses an asynchronous callback to return the result.

**System capability**: SystemCapability.MultimodalInput.Input.InputDevice

**System API**: This is a system API.

**Parameters**

| Name      | Type                         | Mandatory  | Description            |
| -------- | --------------------------- | ---- | -------------- |
| callback | AsyncCallback&lt;number&gt; | Yes   | Callback used to return the result.|

**Error codes**

For details about the error codes, see [Universal Error Codes](../errorcode-universal.md).

| ID | Error Message            |
| ---- | --------------------- |
| 202  | SystemAPI permission error |
| 401  | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified;2. Incorrect parameter types; 3. Parameter verification failed. |

**Example**

```js
try {
  inputDevice.getKeyboardRepeatRate((error: Error, rate: Number) => {
    if (error) {
      console.log(`Get keyboard repeat rate failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
      return;
    }
    console.log(`Get keyboard repeat rate success`);
  });
} catch (error) {
  console.log(`Get keyboard repeat rate failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}
```

## inputDevice.getKeyboardRepeatRate<sup>10+</sup>

getKeyboardRepeatRate(): Promise&lt;number&gt;

Obtains the keyboard repeat rate. This API uses a promise to return the result.

**System capability**: SystemCapability.MultimodalInput.Input.InputDevice

**System API**: This is a system API.

**Return value**

| Parameters                   | Description                 |
| --------------------- | ------------------- |
| Promise&lt;number&gt; | Promise used to return the result.|

**Error codes**

For details about the error codes, see [Universal Error Codes](../errorcode-universal.md).

| ID | Error Message            |
| ---- | --------------------- |
| 202  | SystemAPI permission error |
| 401  | Parameter error. Possible causes: 1. Mandatory parameters are left unspecified;2. Incorrect parameter types; 3. Parameter verification failed. |

**Example**

```js
try {
  inputDevice.getKeyboardRepeatRate().then((rate: Number) => {
    console.log(`Get keyboard repeat rate success`);
  });
} catch (error) {
  console.log(`Get keyboard repeat rate failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}
```