The 650nm Visual Pen Fault Locator has been specifically designed for field workers to provide you with an efficient 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, kinks, or breaks in fiber optic cables. Works with either CW or pulsating light output: 30 mW (30-32 km). Infrared wavelength: 650 nm. Infrared applications: single mode/multimode. Connectors: 2.5 mm general connector (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: 650nm Applications: singlemode fiber / multimode fiber Connectors: 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)