Features 1、Fiber Optic Tester: Specially designed for optical cables and lines maintenance, the VFL pen could locate defects on cables, visually search for fiber breaks. 2、Easy for Operation: Conforms to ergonomic design, the laser head will auto on when the power is on, and auto go back when the power is off, easy to opreate. 3、Better Application: A must have tool for fiber optic engineering construction, fiber optic network maintenance, and fiber optic device production and research. 4、Wide Compatibility: Comes with a 2.5mm universal interface for FC SC ST, the visual fault locator will match your tools perfectly for all your testing needs. 5、Convenient Carrying: Light in weight and compact in size as well, the fiber light tester is very convenient to carry with you for outdoor works. Specification Item Type: Visual Fault Locator Output Distance: 5KM Working Current: ≤ 40mA Battery Life: > 10h Charging Time: ≤ 3h Charging Current: ≤ 300mA Charging Voltage: 5V Static Current: ≤ 15uA Output Level: Not Adjustable Output Wavelength: 650nm Interface: 2.5mm universal interface. Working Temperature: -20 ℃~+60 ℃, non condensing. Storage Temperature: -40~+85 ℃ Power Type: 1 x rechargeable lithium battery, 400mAh. Shipped with built in battery. Package List 1 x Visual Fault Locator 1 x Ceramic Sleeve 1 x Cable 1 x User Manual