For the best performance, we recommend using 4 brand-new AA batteries. 【Fast Inflation with Powerful Air Pump】 Powered by 4 AA batteries (not included), the powerful air pump quickly inflates this dinosaur costume within 1–2 minutes. Simply place the battery pack into the designated pocket, turn on the switch, and enjoy a fully inflated dinosaur look in seconds. Product description

This is a popular costume product that will make your Halloween even more exciting and special.