# Emulation Tab

The Emulation tab controls the particular emulated device in which the MIDlet will be launched. The settings available depend on the particular device definitions that have been configured.

The properties configurable in this tab are:

Option | Description
--- | ---

Project Device

The Device settings allow you to choose the device definition under which your MIDlet will be emulated. This is useful, for example, if you have written the MIDlet using one device, and then want to test it for compatibility under another.
By default, the MIDlet will be run under the device defined in the project properties. To change to a different platform, select the second radio button and choose the device from the selection controls. .

Specific Device | This setting allows you to choose the specific device within the configuration under which your MIDlet will be emulated.
Security Domain | This pull-down list allows you to launch the emulator with a particular security domain selected. This can be useful to debug a signed MIDlet. For more information, see About MIDlet Suite Signing.
Extra Emulation Parameters | You have the option of adding extra parameters that will be passed directly to the emulator. This is useful if, for example, you want to enable tracing in the target JVM/KVM.