1650nm semiconductor special laser is used as luminescent device, driven by a constant current source, optical interface connection port enters singlemode (or multimode) fiber. 2By observing the red light overflow point to find the light leakage or bending point, and realize optical fiber fault detection function. 3Thickened aluminum alloy forging, durable and wearresistant, good oxidation resistance, and longterm use. 4Applicable to various optical fiber interfaces, standard 2.5mm interface, applicable to any interface of FC or ST or SC. 5Pulse continuous waves, fast positioning of fault breakpoints, strong light source and strong penetrating power. 6It is suitable for optical fiber engineering construction, optical fiber network maintenance, optical device production and research, etc. Item Type: Fiber Optical Tester Material: Aluminum Alloy Weight: Approx. 129g or 4.6oz Product Model: TL532 (20mW) Red Light Output Power: >20mw Light Source Wavelength: 650nm Use Optical Fiber: SM, MM Maximum Theoretical Test Distance: 1-5km Power Supply: 2 x AA Battery (Battery Not Included) Red Light Source Continuous Working Time: 20h Working Temperature: 0-60 Storage Temperature: -20 - and70 1 x Fiber Optical Tester (Battery Not Included) 1 x Portable Bag 1 x Manual 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.