These giant fish and shark give hours remote and having fun in even small room (not for outdoor use). They require only four AAA batteries (one on the balloon, three in the controller) and you can even control up and down or even up to 50 feet. This party fish or shark can easily fill up with cheap helium gas in any party store. The body is made from high quality material and can stay inflated for more than a week. The balloon can fill and fill again to reuse it.