Using your Thor Mjolnir Hammer Replica is easy. First, insert 1.5V AA alkaline batteries (not included). Then, simply activate it with your voice to see the lights come on and hear the movie - inspired sound effects. You can use the wrist strap to hold it like Thor. Display it on the included stand to show it off in your collection or wear it for cosplay. When not in use, keep it in a dry place away from direct sunlight. Be careful not to hit or swing it at people or animals. If the lights or sounds stop working, check the batteries and replace them if needed.