Please be aware that these are used items, and please read the description carefully. - Models: Distortus Rex and Super Battle Attack Roaring T-Rex, a set of two! The Distortus Rex roars when batteries are inserted, but sometimes an error sound is heard! The Roaring T-Rex has no cover, but it roars and shakes its head perfectly fine. Both toys are missing their battery covers because they were played with by children. If you're just displaying them, it shouldn't be a problem. They should also be fine for children to play with, like pretending to be dinosaurs, lol. Please understand that both toys are missing their covers!!! - Features: Sound function Please understand that these are junk items!! If you're interested, please consider purchasing. Thank you for looking.