JCID GT01 Optical Detection Probe for Screen Flicker / LV Values Detection1. JCID optical detection probe is specialized in detecting the screen 2. Flicker and LV values, it supports detecting original Apple screens and screens of the third party by connecting to V1S Pro, as well as offline operation 2. Flicker refers to the screen flicker, there are two methods to calculate: FMA and JEITA. The larger the value, the much it hurts the eyes. So the lower the value, the better 3. LV refers to the screen brightness value, it is