Feature 1Fiber Optic Tester: Specially designed for optical cables and lines maintenance, the VFL pen could locate defects on cables, visually search for fiber breaks. 2Easy 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. 3Better Application: A must have tool for fiber optic engineering construction, fiber optic network maintenance, and fiber optic device production and research. 4Wide 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. 5Convenient Carrying: Light in weight and compact in size as well, the fiber light tester is very convenient to carry with you for outdoor works.Item Type: Visual Fault LocatorOutput Distance: 5KMWorking Current: 40mABattery Life: > 10hCharging Time: 3hCharging Current: 300mACharging Voltage: 5VStatic Current: 15uAOutput Level: Not AdjustableOutput Wavelength: 650nmInterface: 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. .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 Visual Fault Locator1 x Ceramic Sleeve1 x Cable1 x User Manual