STAR WARS Electronic Helmets - General Grievous Star Wars Electronic Helmet - General Grevious. Adjustable straps. Simply adjust the straps for a comfortable, snug fit. The helmet will fit perfectly with the straps that wrap underneath the neck. General Grievous phrases. Press the button for interactive General Grievous phrases. These phrases are taken from the movie, so you can feel like you are really part of the action. Can be used by kids and grown-ups. The General Grievous helmet can be used by kids and grown-ups alike. The straps easily adjust to any size head, so you can even engage in the Star Wars action as an adult Replicates equipment in movie. The helmet replicates the equipment used by General Grievous in the movie. Now you can look just like a general in the droid army.