Feature: 1. 400 times magnification, fast detection of dents, scratches, pollution, etc. on FC/SC/ST type fiber jumping wires/tail fiber (male). 2. Fiber end face with clear images, good centering, which is widely used in optical communications and other industries. 3. Monocular handheld fiber optic microscope, using high‑quality plastic materials, with good durability. 4. Fine focusing control, high measurement accuracy, it can detect PC end face and for APC end face. 5. It is an indispensable optical fiber end face inspection equipment for operators and engineers in field operations and lasers printing plate‑making maintenance. Specification: Item Type: Microscope Material: Plastic LED: Rated Life 10000h Control: Instant switch, fine focusing control Safety Filter: Built-in adapter interface, use interchangeable universal or special adapter Measuring Range: Fiber Inspection Measurement Accuracy: 400 Purpose: Optical fiber interface stain and scratch detection Use Batteries: 3 x AAA Battery (Battery Not Included) Size: Approx. 225x39.5x56mm / 8.9x1.6x2.2in How to Use: 1. Open the battery cover before use and install 3 AAA battery (not included) with the positive pole facing the "light source switch"; 2. Insert the optical fiber (jumping wire) to be tested into the optical fiber interface, and the other end into the backlight window, the effect is better; 3. Look through the eyepiece and press the instant on/off indicator to switch (illuminance); 4. Adjust the focus wheel to find a clear observation point.. Package List: 1 x Microscope (Battery Not Included)1 x Manual1 x Cloth Bag Note: 1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.