A surveillance camera with less than 2 megapixels should not be purchased. Our minimum recommendation is a 1K surveillance camera with a resolution of 2 megapixels for small areas such as private homes and small businesses, and a 2K surveillance camera with a resolution of 4 megapixels for medium-sized areas, businesses, and sophisticated people's residences. These small hidden spy cameras and IP spy cameras carry an overall satisfactory resolution.