Not a very powerful pump. With difficulty he blew up toys in the pool for his grandchildren. I'm sorry I bought this. PS I heard from the company and they are sending me a new pump. I'll see if that makes a difference. I really appreciate that they replied to me straight away, shows good customer service. The problem I had was solved. They sent me a new device, it works perfectly. Thank you for listening and solving my problem so quickly. Despite being a small business, they seem to care about their customers. Many Thanks