Security Cameras Made Simple : Chapter 1 - Types of Suppliers
http://www.backstreet-surveillance.com/security-cameras-made-easy-1/suppliers-value.html | Professional grade cameras offer performance compared to consumer grade systems. Consumer grade cameras have low quality recording, no live technical support, and are not equipped with viewing adjustments. Backstreet Surveillance offers professional surveillance systems that are reliable and easy to install. For more information call 1-800-431-3056.