Designed for Air Dream™ Mattresses This replacement air pump is designed to work with Air Dream™ Air Mattresses and is used for inflating them. Pump runs off of 110v AC electricity. Easy to Use The easy-to-use hand pump allows the consumer to get the mattress ready in less than one minute. Attaching the pump is simple -- simply open the air valve and turn the pump clockwise to attach it. If the mattress is too firm after filling, simply pressing a button located on the air valve allows air to escape softening the firmness of the mattress.