Feature:1. ROTATING SWITCH: This visual fault locator has a rotating switch, with automatic lifting on and off function, making it convenient and practical.2. BUILT IN BATTERY: This fiber test pen has built in 1800mAh lithium battery, and supports power bank, computer, and adapter power supply.3. LIGHTING FUNCTION: This fiber optic tester has lighting function, easy to work in dark environments such as the outdoor, computer room, and at night.4. WIDE APPLICATION: Can achieve fiber optic fault detection, used in fiber optic engineering construction, network maintenance, fiber optic device production, etc.5. OUTPUT PARAMETER: The visual fault locator has an output distance of 15KM and an output wavelength of 650nm, with a wide range of applications.Specification:Item Type: Visual Fault LocatorOutput Distance: 15KMWorking Current: 150mARange Time: 12HCharging Duration: <5hOutput Wavelength: 650nmInterface Type: 2.5mm Universal AdapterPower Supply: 1 x 1800mAh Lithium Battery (built in battery)Charging Current: 600mACharging Voltage: 5VWorking Temperature: -20-60 (without condensation)Storage Temperature: -40-85.Package List:1 x Visual Fault Locator1 x USB Cable1 x Portable Rope1 x Ceramic Tube