There was a certain amount of drilling to insert cables but any dust was cleaned up. The digicam is just not obtrusive and offers a fantastic image. We chose Crism for our security digital camera due to the fact we know and have faith in the proprietor Chris Mortimer. https://cctvinstallationinwakefie11110.jts-blog.com/35212159/indicators-on-cctv-installation-in-wakefield-you-should-know