There was a certain amount of drilling to insert cables but any dust was cleaned up. The digicam isn't obtrusive and offers a very good picture. We chose Crism for our stability camera due to the fact we know and have confidence in the owner Chris Mortimer. On the https://cctvinstallationinwakefie33333.blogkoo.com/a-secret-weapon-for-cctv-installation-in-wakefield-55604288