Feature:1. MICRO BEND TEST TECHNIQUE: Optical fiber identifier adopts micro bend test technique and can accurately identify the direction of optical fibers.2. SIGNAL DIRECTION: When the optical fiber has signals, the left and right direction indicator of optical fiber identifier tester displays the signal direction.3. RANGE: The wavelength identification range of fiber optic identifier is 800-1700nm, the optical power reading range is -40dBm-10dBm, the signal frequency range is 270Hz, 1kHz, 2kHz.4. VFL AND LED LIGHT: Optical fiber identifier is with red light source VFL and LED light stable strong beam concentration, effectively cooperate with line detection, online test without interrupting the light source.5. OPERATING MODE: VFL optical fiber identifier tester is simple, quick and convenient, with light cover, to provide the most accurate test results.Specification:Item Type: Fiber Optic TesterMaterial: ABSWavelength Identification Range: 800-1700nmSignal Recognition Type: CW, 270Hz5%, 1kHz5%, 2kHz5%Detector Type: Diameter, Approx. 1mm / 0.04in, InGaAs 2pcsSuitable Fiber Type: Universal Diameter 0.25mm(Bare Fiber), 0.9mm, 2.0mm, 3.0mm Fiber Optic CordsSignal Direction Indicator: Left And Right Direction IndicationOptical Power Reading Range: -40 DBm -10 DBmSignal Frequency Range: 270Hz,1kHz,2kHzOperating Temperature Range: -10-60Storage Temperature Range: -25 - 70 Battery: AA x 2 (Shipped Without Battery)Test Distance: 5-8kmLaser Type: LDLED Flashlight: Support.Package List:1 x Optical Fiber Tester1 x Storage BagNote:4 in 1 universal fixture, online test without replacing the fixture, to ensure that no damage to the optical fiber.