1、ACCURATE IDENTIFICATION AND DISPLAY: Optical fiber identifier can accurately identify the direction of the optical fiber. When the optical fiber has a signal, the left and right direction indicator display the signal direction. The light on the left side indicate that the light source is from right to left 2、WITH WARNING: The live optical fiber identifier effectively identifies the direction of traffic and frequency tones (270Hz, 1KHz, 2KHz) with audible warnings 3、MEASURING DISTANCE: Multifunctional optical fiber identifier built in VFL red light source, measuring distance of about 10km 4、SCRATCH RESISTANT ABS: Optical fiber power meter adopt excellent ABS material, possess impact resistance, scratch resistance, environmentally friendly 5、WITH BOX: FTTH tool is equipped with a storage box for easy storage, portability and access, and also prevent damage and loss