Hi guys, Welcome to the Advanced Video Search Engine, and you are watching 《翊浩科技》住戶室內對講機使用操作影片. That video is uploaded by David Wu at 2021-07-13T08:12:51-07:00. We are promoting this video only for entertainment and educational purpose only. So, I hope you like & enjoy it. [Nc7rKi_l3QI]