Designed to be in the shape of a pen, easy to carry. The 30 mW visual fault locator is used for measurement in single-mode or multi-mode fibers. Quantum well, light source, MOD and CW working mode, universal 2.5mm interface, SC, ST, FC, detection range, output power stability. (For LC/MU interface, you need to purchase a conversion adapter.) To test the optical fiber position, bending, etc., in the detection of hidden defects of optical reflectometer and finally, at the end of the optical fiber identification, the optimization of the mechanical connection point. Widely used in telecommunications, cable TV engineering and maintenance, cabling integrated, construction and maintenance, optical equipment, production and research, as well as in fiber engineering. Output distance This 30mW strong red light visual fault locator reaches a distance of 20-30km and highly efficient power circuits enable stable power supply. Small Size and Metallic Painting Design Designed to be in the shape of a pen, easy to carry. It is designed with a stainless steel head and an aluminum body to prevent collision and dust, and the ground design of the case effectively prevents ESD damage. Widely used p> The detector's universal 2.5mm connector is designed compatibly for ST, SC and FC cables that interfere with both circle shape and square shape of different fiber optic cables. Test single-mode and multi-mode cables. Package Contents 1 x Visual Fault Locator 1 x Packaging Box < p>1 x Bag 1 x Lanyard Technical specifications: Wavelength: 650nm Output power: 30mW Connector: 2.5mm general connector (SC / FC / ST) Frequency: 1 Hz Power: 1.5V AA (Battery not included in the package ) Operating temperature: -10 to +45 Range: 20 - 30 km Weight: 100g Dimension: 2.6 cm * 17.5cm