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 Identifier Model: AUA-40A Material: ABS Battery: 2 x AA battery, shipped without battery. Use: For fiber optic identification. Wavelength Range: 800-1700nm Signal Recognition: CW, 270Hz ± 5%, 1kHz ± 5%, 2kHz ± 5%. 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~+10dBm. Linear Display Resolution: 0.1%. Logarithmic Display: 0.01dBm Red Light Source Range: Greater than 10km. Working Temperature: -10~+60℃ Storage Temperature: -25~+70℃. Package List: 1 x Optical Fiber Identifier1 x User Manual1 x Storage Bag