Feature: 1. Easy and convenient design, no need to change the fixture when testing on the cable, single-mode and multi-mode can be used universally. 2. It can identify the signal frequency of 270Hz/1kHz/2kHz, and there will be a buzzer sound when identifying the frequency. 3. Equipped with left and right direction lights to display the signal direction and can accurately identify the direction of the fiber. The left direction light is on to indicate that the light source is from right to left. 4. Light-weight body, small size, proper button placement, you can easily pick up the test, easy to use and barrier-free 5. Automatically shut down after ten minutes of no operation, energy saving and power saving, prolonging the use time. Specification: Item Type: Optical Fiber Identifier Model: AUA-40 Material: ABS Battery: 1.5V 2xAA Battery (Battery Not Included) Purpose: It can be used for fiber identification. Type Parameter Wavelength Range 800-1700nm Signal Recognition Type CW, 270Hz±5%, 1kHz±5%, 2kHz±5% Detector Type φ1mm InGaAs 2 pcs Adapter Fiber Type Universal φ0.25 (bare fiber), φ0.9, φ2.0, φ3.0 fiber jumper Signal Direction Left and right direction indication by LED indicator Optical Power Reading Range -40dBm - +10dBm Signal Frequency Range 270Hz, 1kHz, 2kHz Red Light Test Wavelength 650nm±10nm Red Light Output Power ＞10mW Operating Temperature -10~+60℃ Storage Temperature -25~+70℃ . Package List: 1 x Optical Fiber Identifier (Battery Not Included)1 x Manual1 x Carrying Case