Have you already paid for them Sharon? That scanner is probably the most annoying one I've ever used, the chip number doesn't stay on the screen long enough to write it down and it's not held in the memory. You also have to press and hold the button the entire time you're scanning which can be tricky when you're trying to restrain an animal and when you don't find a chip you doubt yourself as to whether you were holding the button down
It may be that it's an updated model and the above features have been improved but if not I'd seriously see about getting a different model. The one we have at the moment is much better, the chip number stays on the screen and you only have to press the button once to start scanning, it's also a much better shape.