Feature:1. IDENTIFY FIBER DIRECTION: Micro bending testing technology accurately identifies fiber direction. When the fiber has a signal, the left and right direction lights display the signal direction.2. LED LIGHT: Equipped with a red light source, the LED light is stable and powerful with concentrated beam, effectively cooperating with circuit detection, and there is no need to interrupt the light source during online testing.3. EASY TO OPERATE: Simple, fast, and convenient, equipped with a light hood to provide the most accurate test results.4. WIDE MEASUREMENT RANGE: This optical tester can provide from 800 to 1700nm optical power measurement range. And has a test distance 5000 to 8000m.5. ABS MATERIAL: Made of premium ABS material, this optical fiber tester possesses scratch resistant and impact resistant, has a long service life.Specification:Item Type: Optical Fiber Identifier Material: ABS Wavelength Recognition Range: 800 to 1700nmSignal Recognition Type: CW, 270Hz 5%, 1kHz 5%, 2kHz 5%Detector Type: Dia. Approx. 1mm / 0.04in for InGaAs 2 pcsCommon Types of Adaptive Optical Fibers: Dia. Approx. 0.25mm / 0.01in (bare fiber), Dia. Approx. 0.9mm / 0.04in, Dia. Approx. 2mm / 0.08in, Dia. Approx. 3mm / 0.12in fiber optic cableSignal Direction Indicator Light: Left and right direction indicatorsOptical Power Reading Range: -40 dBm to 10 dBmSignal Frequency Range: 270Hz, 1kHz, 2kHzWorking Temperature Range: -10 to 60 Storage Temperature Range: -25 to 70 Battery: AA x 2 (shipped without battery)Optical Power Meter: - 70 to +6dbmTest Distance: Approx. 5000 to 8000m / 16404.2 to 26246.7ftWavelength Range: 650nmLaser Type: LDLED Flashlight: Support.Package List:1 x Optical Fiber Identifier 1 x Storage Bag Note:Four in one universal fixture, no need to replace the fixture for online testing, ensuring no damage to the optical fiber.