A vibrating insect that will entertain your cat as it travels along any hard surface. There is an on/off switch on the underside. If the toy bumps in to an object it will usually redirect itself and continue moving. It’s fun to put the bug in a small light weight clear plastic bag and watch your cat’s reaction. If you have a circle or track toy of any kind place the bug inside and let your cat try to catch it. There is an enclosed mini screw driver to use when you need to replace the widely available LR44 battery.