.NET mobile controls features:

Build web pages for many types of mobile devices instead of targeting specific ones.

Allow creation of user controls with events

Offer same features as ASP.NET Pages and server controls along with support to work with multiple devices.

Allow customizing the output for a specific device by adding a new adapter for the control.

Can create new controls which can use inheritance or composition.

Allow adding support for an entirely new device by using adapter extensibility with no changes to individual applications.