Features DIRECTION RECOGNITION: Using micro bend testing technology to accurately identify the direction of the fiber, when there is a signal, the left and right direction light display the signal direction. STABLE LIGHT SOURCE: With red light source and LED light, stable and powerful, with concentrated beam, combined with circuit detection, no need to interrupt the light source during online testing. APPLICABLE RANGE: The recognition wavelength range is 800nm‑1700nm, the signal power detection range is ‑40‑10 dBm, suitable for 0.25mm bare fibers, 0.9mm, 2.0mm, and 3.0mm tail fibers. WITH LIGHT HOOD: The fiber optic signal identifier is equipped with light shield, providing accurate and stable measuring results, greatly improving measurement efficiency. PORTABLE DESIGN: The optical fiber signal identifier is portable design, simple and convenient operation, can identify 270Hz, 1kHz, 2kHz signal frequency, strong practicability. Package List 1 x Optical Fiber Identifier 1 x Storage Bag 3 x Accessories