# ScheduledInstancesLaunchSpecification
<a name="API_ScheduledInstancesLaunchSpecification"></a>

Describes the launch specification for a Scheduled Instance.

If you are launching the Scheduled Instance in EC2-VPC, you must specify the ID of the subnet. You can specify the subnet using either `SubnetId` or `NetworkInterface`.

## Contents
<a name="API_ScheduledInstancesLaunchSpecification_Contents"></a>

 ** ImageId **   
The ID of the Amazon Machine Image (AMI).  
Type: String  
Required: Yes

 ** BlockDeviceMapping.N **   
The block device mapping entries.  
Type: Array of [ScheduledInstancesBlockDeviceMapping](API_ScheduledInstancesBlockDeviceMapping.md) objects  
Required: No

 ** EbsOptimized **   
Indicates whether the instances are optimized for EBS I/O. This optimization provides dedicated throughput to Amazon EBS and an optimized configuration stack to provide optimal EBS I/O performance. This optimization isn't available with all instance types. Additional usage charges apply when using an EBS-optimized instance.  
Default: `false`   
Type: Boolean  
Required: No

 ** IamInstanceProfile **   
The IAM instance profile.  
Type: [ScheduledInstancesIamInstanceProfile](API_ScheduledInstancesIamInstanceProfile.md) object  
Required: No

 ** InstanceType **   
The instance type.  
Type: String  
Required: No

 ** KernelId **   
The ID of the kernel.  
Type: String  
Required: No

 ** KeyName **   
The name of the key pair.  
Type: String  
Required: No

 ** Monitoring **   
Enable or disable monitoring for the instances.  
Type: [ScheduledInstancesMonitoring](API_ScheduledInstancesMonitoring.md) object  
Required: No

 ** NetworkInterface.N **   
The network interfaces.  
Type: Array of [ScheduledInstancesNetworkInterface](API_ScheduledInstancesNetworkInterface.md) objects  
Required: No

 ** Placement **   
The placement information.  
Type: [ScheduledInstancesPlacement](API_ScheduledInstancesPlacement.md) object  
Required: No

 ** RamdiskId **   
The ID of the RAM disk.  
Type: String  
Required: No

 ** SecurityGroupId.N **   
The IDs of the security groups.  
Type: Array of strings  
Required: No

 ** SubnetId **   
The ID of the subnet in which to launch the instances.  
Type: String  
Required: No

 ** UserData **   
The base64-encoded MIME user data.  
Type: String  
Required: No

## See Also
<a name="API_ScheduledInstancesLaunchSpecification_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/ec2-2016-11-15/ScheduledInstancesLaunchSpecification) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/ec2-2016-11-15/ScheduledInstancesLaunchSpecification) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/ec2-2016-11-15/ScheduledInstancesLaunchSpecification)