Feature:1. ACCURATELY IDENTIFY: Optical fiber identifier accurately identify the direction of the optical fiber. When the optical fiber has a signal, the left and right direction indicator shows the signal direction.2. AUDIBLE WARNING: Optical fiber identifier can do effective identification of traffic direction and frequency tones (270Hz, 1KHz, 2KHz) with audible warning.3. Visual Fault Locator VFL: The optical power meter is built in VFL red lighting visual fault locator can measure a distance of about 10km.4. Optical Power Reading Range: This meter optical power reading range is 70dBm +10dBm and optical power meter wavelength range is 8501650nm.5. Made of ABS Material: Our VFL optical power meter identifier is made of ABS material and light in overall weight for simple carrying.Specification:Item Type: Fiber Optic IdentifierMaterial: ABSBattery: Lithium Polymers 3.7V 650mAh (Shipped With Built In Battery)Use: Fiber Optic IdentificationWavelength Range: 800-1700nmSignal Recognition Type: CW, 270Hz5%, 1kHz5%, 2kHz5%Detector Type: 1mm Diameter InGaAs 2 PcsAdaptation Fiber Type: Universal Diameter 0.25 Or Diameter 0.9 (For Bare Fiber), Diameter 2.0, Diameter 3.0 (For Pigtail)Signal Direction: LED Indicator Left And Right Direction IndicationOptical Power Reading Range: -70dBm - +10dBmDisplay Resolution: Linear Display 0.1%. Logarithmic Display, 0.01dBmOptical Power Meter Wavelength Range: 850-1650nmRed Light Source Use Distance: Greater Than 10kmOperating Temperature: -10 - +60Storage Temperature: -25 - +70.Package List:1 x Optical Fiber Identifier1 x Manual1 x USB Cable1 x Storage Box