同步指示灯 meaning in English

lamp synchroscope
synchro light
synchronizing lamp

After power switch opening , the clock displayer display asynchronous timing information , so synchronous indicating lamp glimmer , when equipment receiving above four effective satellite information and getting synchronous , which synchronous indicating lamp blank off
电源开关打开后，时钟显示器显示未同步的时间信息，同步指示灯闪烁，装置接受到四颗以上的有效卫星信息，并取得同步后，则同步指示灯熄灭。