1650nm semiconductor special laser is used as light-emitting device (uncommon LED), which is driven by a constant current source to emit stable red light. 2Enter single-mode (or multi-mode) fiber with optical interface connection port, find light leakage or bending point by observing red light overflow point to realize the fiber fault detection. 3Suitable for various optical fiber interfaces, standard 2.5mm interface, used for FC/ST/SC any interface. 4Pulse continuous waves is used to quickly locate fault breakpoints. The light source is powerful and easy to penetrate. 5Widely used in optical fiber engineering construction, optical fiber network maintenance, optical device production and research, etc. Item Type: Fiber Optical TesterMaterial: Aluminum AlloyProduct Model: TL532 (50mW)Red Light Output Power: >50mwLight Source Wavelength: 650nmUse Optical Fiber: SM, MMMaximum Theoretical Test Distance: 1-5kmPower Supply: 2 x AA Battery (Battery Not Included)Red Light Source Continuous Working Time: 20hWorking Temperature: 0-60Storage Temperature: -20 - +70 1xFiberOpticalTester(BatteryNotIncluded)1xPortableBag1xManual 1. In general, the higher the temperature, the shorter the laser life, so try to avoid high temperature working environment when using it.2. The fiber head is cleaned when the laser is working.3. When not using the light source, please cover the dust cover to prevent dust from falling into it.4. The battery should be taken out when not in use.