Discover this Visual Fault Locator, designed for efficient fiber optic fault detection. Features a rotating switch with automatic on/off function for convenience. Equipped with a built-in 1800mAh lithium battery and supports power bank, computer, and adapter charging. Includes a lighting function, making it easy to work in dark environments. With a 15km output distance and 650nm output wavelength, it's suitable for fiber optic construction, network maintenance, and device production. Specifications: Output Distance: 15 km Working Current: ≤ 150mA Range Time: ≥12H Charging Time: <5h Output Wavelength: 650nm Interface Type: 2.5mm universal adapter Power Supply: 1 x 1800mAh lithium battery (built-in) Charging Current: 600mA Charging Voltage: 5V Working Temperature: -20℃-60℃ Storage Temperature: -40℃-85℃ Package includes: 1 x Visual Fault Locator 1 x USB Cable 1 x Portable Rope 1 x Ceramic Tube