Welcome to our store! 1, VFL Red Light Pen: Specifically designed for fiber optic cable and wiring design and maintenance to locate cable and wire defects. 2、Non-Contact Connection: This connection is non-destructive to the fiber and transmitter end face, and the output power is not affected by voltage fluctuations. 3, Stable Output: The fiber optic pen has stable output power, with an output distance of 50km, making it a great tool for fiber testing. 4, Small and Portable: The fiber optic pen is small in size, light in weight, energy-saving, and easy to carry for outdoor work. 5, Aluminum Alloy: The aluminum alloy shell of the locator is corrosion-resistant, rust-proof, and resistant to drops and wear, ensuring a long service life. Item Type: VFL Red Light Pen Material: Aluminum Alloy Output Power: >50MW Output Distance: 50km Output Wavelength: 650±10nm Operating Temperature: 0-60 ℃ Storage Temperature: -20-70 ℃ Battery Type: 2 x 1.5V AA Batteries (Not Included) Color: Black Includes: 1 x VFL Red Light Pen 1 x Pen Case 1 x Lanyard 1 x Ceramic Core 1 x Instruction Manual 1 x FC to LC Converter