Extech FO600FC2-KIT FiberMeter Test Kit features: Fiber certification with high accuracy and high resolution for both multimode and/or singlemode applications; Choose from multimode, single mode or dual multimode and single mode kits; Internal memory stores up to 1000 measurements and physical fiber characteristics for up to four sites; Selectively view, re-measure, print or delete stored information; Use the RS-232 interface and Windows® compatible. This particular model comes with FO600 Power Meter and 850/1300 LED source w/ ST connector and 1310/1550 laser source w/ FC connector.