Fiber optic identifiers are a must-have tool for fiber maintenance during maintenance, installation, cabling, and recovery, and are often used for lossless fiber identification. Find and separate a specific fiber in any single-mode and multi-mode fiber position. By illuminating the 1310 or 1550 optical signal with a specific modulated signal into the fiber at one end, identify it with the identifier on the line, and can also indicate the business.How to use: Use the appropriate fixture head, clamp the fiber under test (bare fiber or pigtail) into the test area, and then restart for testing.Features: Relative optical power in digital display fiber. Portable style, the direction and frequency of light can be discerned without interrupting the fiber. The "one-touch" operation mode makes the operation simple and convenient. Corresponding adapter heads are provided for bare fibers and a variety of tail fiber. Can recognize three common signal frequencies, namely 2KHz, 1KHz, 270Hz. Specification:Instrument model: KFI-35Wavelength recognition range: 800-1700nmIdentification signal type: CW, 270HZ±5%, 1KHZ±5%, 2KHZ±5%Probe Model: 1 InGaAa 2pcsAdapter type (mm): H 0.9/0.25 for bare fiber H 2.0/3.0 for tail fiberSignal direction: Left and right LED indicationRelative optical power value: Digital displayOptical signal frequency: 270HZ, 1KHZ, 2KHZ LED indicator displayWorking temperature (°C): -10 ~ 60Storage temperature (°C): -25 ~ 70Power supply battery: 9V dry battery (not included)Package list:1 * Optical Fiber Identifier3 * Adapters1 * Hand Bag1 * Instruction Manual Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.