下载 APKPure App
可在安卓获取Optical Messenger的历史版本
在课堂上沉默的光通信，在工作中，在讲座等
- Silent optical communication in class, at work, during lectures, etc
- Write a message and show it to someone
- Automatic formatting for maximum font size in billboard mode
- Long-range communication using tablet and marquee mode
- Modes: billboard, marquee