This awesome Ben 10 F/X Omnitrix "watch"

The lights and sounds work, just be sure that you push down on the top for a few seconds lightly to make the full transformation sound (you can't just slam it like Ben does.)  

The dial makes sounds and lights up when you change from alien to alien, it also makes the power down sound after the top's been depressed to make the transformation.  

Please don't hesitate to ask questions. Thanks for looking!