The 650nm Visual Pen Flaw Detector has been specifically designed for field workers to provide you with an effective and essential tool. A cost-effective solution for checking fiber optic cables and verifying optical network continuity during and after installation. Find the breakpoint, bad connections, knots or breaks in fiber optic cables. Works with either CW or pulsed light output power: 30 mW (30-32 km). Infrared wavelength: 650 nm. Infrared applications: single mode/multimode. Connectors: 2.5mm general connection (SC/FC/ST interface available). Features: continuous wave and pulse mode, constant output. Power supply: 2 AAA batteries. Housing material: aluminum. Dimensions: length: 175 mm, diameter: 26 mm. Power: 30mW Wavelength: 650 nm Applications: singlemode fiber / multimode fiber Connections: 1.25mm (or) 2.5mm universal FC connector (SC/FC/ST interface available). Note: 1.25 FC not included, adapter required Power supply: 2 AAA batteries (batteries not included)