Feature:1. ACCURATE IDENTIFICATION AND DISPLAY: Optical fiber identifier can accurately identify the direction of the optical fiber. When the optical fiber has a signal, the left and right direction indicator display the signal direction. The light on the left side indicate that the light source is from right to left2. WITH WARNING: The live optical fiber identifier effectively identifies the direction of traffic and frequency tones (270Hz, 1KHz, 2KHz) with audible warnings3. MEASURING DISTANCE: Multifunctional optical fiber identifier built in VFL red light source, measuring distance of about 10km4. SCRATCH RESISTANT ABS: Optical fiber power meter adopt excellent ABS material, possess impact resistance, scratch resistance, environmentally friendly5. WITH BOX: FTTH tool is equipped with a storage box for easy storage, portability and access, and also prevent damage and lossSpecification:Item Type: Optical Fiber IdentifierMaterial: ABSBattery: 1 x 3.7V polymer lithium battery 802040 650mAhUse: Optical fiber identificationBasic Parameters: Wavelength Range: 800-1700nmSignal Recognition Type: CW, 270Hz5%, 1kHz5%, 2kHz5%Detector Type: 2 x Diameter 1mm for InGaAsAdaptive Fiber Type: Universal diameter 0.25 (for bare fiber), dia 0.9, dia 2.0, dia 3.0 fiber jumperSignal Direction: LED indicator indicate the left and right directionOptical Power Reading Range: -40dBm to +10dBmDisplay Resolution: Linear Display: 0.1%. Log Display: 0.01dBmRed Light Source Distance: >10kmOperating Temperature: -10~+60Storage Temperature: -25~+70.Package List:1 x Identifier1 x User Manual1 x USB Cable1 x Storage Box