Feature 1ACCURATE IDENTIFICATION: Visual fault locator can easily and accurately detect and locate fiber optic breaks, poor connections, bends, or ruptures. Operate in continuous wave or pulse mode. VFL emits 650nm red light for fiber tracking and positioning, and breaks or malfunctions can refract light in the fiber. 2EXCELLENT FUNCTION: Fiber optic tester has multiple functions such as constant output power, low battery warning, long battery life, and remote detection. Effectively conduct fiber optic wiring and continuity checks to generate bright light around the faulty area. 3WIDELY USED: A universal 2.5mm connector designed specifically for ST, SC, and FC, which can interfere in circular and square shapes of different optical cables and can be used for testing single mode and multimode cables. Suitable for integrated wiring systems and fiber optic engineering; CATV engineering optical network maintenance; Optical communication; Optical measurement drive engineering; Production and research of optical devices. 4DETECTION DISTANCE: Visual fault locator has a strong light source output power of 30mW, and a constant output power. The strong red light propagates 30 kilometers (maximum) in the optical cable. The high effective power circuit provides stable power, continuous wave, and pulse modes. 5PRACTICAL DESIGN: Small in size and light in weight, the pen style design makes VFL easy to carry, and optical fiber faults can be easily detected through a visual fault locator. The stainless steel head and aluminum body design can prevent collisions and dust, and the shell grounding design can prevent effective ESD damage. 6LED ILLUMINATED FLASHLIGHT: High brightness LED flashlight function can easily cope with dim environments and efficiently carry out construction.Item Type: Red Light PenMode: SGV30Material: ABS Output Fiber Power: Greater than 30mWOutput Wavelength: 650nmInterface: Approx. 2.5mm / 0.1in universalEffective Distance: Approx. 30000m / 98425.2ftOperating Temperature: -20 to +60 Storage Temperature: -40 to +85 Power Supply Battery Type: Lithium ion battery 900mAh (built in carrying) .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Red Light Pen1 x Manual1 x Ceramic Core1 x Charging Cable1 x Hanging Rope