Could you tell me something about best available covert cameras?

You can go for Ultimate Covert Surveillance System. Spytrac has one very small camera which can literally be put anywhere which you called the Ultimate Covert Surveillance System. So, if the person wanted to place it in anything or virtually anywhere which they wanted quickly, this would be the ultimate device to do it. The size is one of the best features. So for all the portability of the tiny covert camera it just deserves to be on the list. There is only one of the drawback which is the it's hefty little price tag. You can own one for a little more than $500. I am sure that for some of the people it is even more than well worth the money. Or you can even go for micro eyes. This little guy which has a large boast, it is the totally the world's first micro camera in the shape of the ball. No wonder it is just called the Eyeball Camera. Due to the size this covert Micro Eyes DVR Ball Cam is very much portable but it will cost you around $300 or even less. On the other hand it can even be hidden pretty much anywhere where you would possible need it to.