Specification Brand : Phefop BulletPoint1 : [Multi-mode Fiber Support] The vfl red light pen supports both multi-mode and single-mode optical fibers, compatible with fc, sc, st interfaces. BulletPoint2 : [Fault Detection Function] Essential in optical fiber engineering, network maintenance, production, and research for detecting optical fiber faults. BulletPoint3 : [Lighting Function] Fiber optic cable visual fault locator features a lighting function, making it convenient for inspections in dark environments like field, equipment rooms, and nights. BulletPoint4 : [Ergonomic Design] Visual fault locator is lightweight and comfortable, making it easy to carry around. BulletPoint5 : [Variety of Power Supply Modes] Support various power supply modes such as batteries, charging banks, computers, adapters, and lithium batteries. IncludedComponents : No ItemName : VFL Fiber Optic Tester Kit,5KM Fiber Optic Cable Source Tester VFL Red Light Pen for Network Test Support FC SC ST Port ItemPackageDimensions_Height : 3 centimeters ItemPackageDimensions_Length : 15 centimeters ItemPackageDimensions_Width : 6 centimeters ItemTypeKeyword : network-and-cable-testers Manufacturer : Phefop MeasurementAccuracy : 0.1mm ModelName : Phefop9dyxbprv46 ModelNumber : Phefop9dyxbprv46 NumberOfItems : 1 PartNumber : Phefop9dyxbprv46 ProductDescription : Spec: