General Tools Borescope
When it comes to inspecting larger residential or commercial drain / duct systems, you will find yourself in a category of products you might not fully understand. The General Tools DPS16 is one of those types of inspection systems.
Are looking for an entry level video borescope to do some minor inspections around the house or some basic automotive applications? The General Tools DCS050 USB Video Borescope starts around $50 and is pretty nifty. Nifty as this borescope may be, it does have its limitations. For instance, it will not let you view the bottom of a 900ft well to do inspections. First, the probe is only 1m (3.28ft) in length, but you can add extensions up to 5m(15ft).