There are many types of spy cams in existence. Some are larger than others and have basic functionality while others are minute but incredibly powerful. Your choice of spy camera will largely depend on the application. If you want to spy on your employees or spouse, the smallest spy cameras should be considered. If you want a spy camera to act as a secret surveillance system in your backyard, however, a larger device may be selected.
The best spy cams have wireless capability and can store hours of footage. They also have an inbuilt battery, so they can work even when there is no power. The quality of video footage they produce and store is also impressive. Before choosing a camera, be sure to shop around to check out what different vendors have to offer. You also need to compare prices before committing yourself.