From the Manufacturer: High-powered microscope is used to check a connector’s end face for excess epoxy, core or cladding chips or other irregularities that degrade optical performance of the connector. Laser safety filter protects eyesight. Rubber eyecup for comfortable use. Rugged aluminum housing. 200X magnification. Universal adapter works with ST, SC or FC connectors. Includes padded nylon carrying case. Product Description: Fiber Optic Inspection Microscope. High-powered microscope is used to check a connector’s end face for excess epoxy, core or cladding chips or other irregularities that degrade optical performance of the connector. Laser safety filter protects eyesight. Rubber eyecup for comfortable use. Rugged aluminum housing. 200X magnification. Universal adapter works with ST, SC or FC connectors.