Review on GESD Universal Telecommunications Engineering Maintenance by Juzer Rashid

GESD 30mW, 30km Visual Fault Detector Fiber Optic Cable Tester The VFL red light meter is not reliable. When it works it emits a powerful light that is bright and useful for detecting breaks and identifying fiber optic cables. However, the VFL light may be on, but if you lower it to check the light on the other end, the VFL may turn off. You have to hit him to turn the light back on. Also, be sure to wrap the switch in tape so it doesn't accidentally turn on when kept in your tool bag. DO NOT BUY if you use this daily professionally.