What a great product. I was very unsure of buying this due to the negative feedback which has been left but my 4 year old loves it!! Im not sure what others expected but it makes a long beeping noise when you press the button on the front and then the noise changes after a minute to indicate something has been located. My 2 boys run around the house trying to locate dinosaurs and are in their element. I have even brought another one so they dont keep fighting over it. For anyone who has a Primeval fan I would definately recommend it, the price is good (not to expensive), it is durable and the kids will have fun for hours with it.