Feature:1. Simple Operation: The fiber identifier can be tested online without changing fixtures, and is universal for single mode and multi mode.2. Multi Frequency Identification: The optical fiber identifier can identify 270Hz, 1KHz, 2KHz signal frequency, meeting your various needs.3. Sound Prompt: The handheld fiber optic identifier has sound indicate when identifying the frequency, largely simplifying your operation.4. Light Display Direction: This fiber identifier can accurately identify the fiber direction which light indicator light can show left and right.5. Excellent ABS Material: The fiber optic identifier is made of premium ABS material, has high strength, not easy to damage, sturdy and durable.Specification:Item Type: Optical Fiber IdentifierModel: AUA-40AMaterial: ABSBattery: 2 x AA battery, shipped without battery. Use: For fiber optic identification. Wavelength Range: 800-1700nmSignal Recognition: CW, 270Hz 5 percent , 1kHz 5 percent , 2kHz 5 percent . Detector Type: 2pcs 1mm InGaAs. Applicable Fiber: Universal for dia0.25 bare fibers, dia0.9, dia2.0, dia3.0 fiber optic patch cords. Signal Direction: LED indicator light for left and right direction indication. Optical Power Reading Range: -40dBm-and10dBm. Linear Display Resolution: 0.1 percent . Logarithmic Display: 0.01dBmRed Light Source Range: Greater than 10km. Working Temperature: -10-and60Storage Temperature: -25-and70.Package List:1 x Optical Fiber Identifier1 x User Manual1 x Storage Bag