红外线发光二极管灯光能打多远？

跟环境、功率是有关系的！
你说的是哪一种啊？？我见过最大的有上十米吧！

看发射功率，聚焦条件，环境条件，一般也就10米。
要是下雨、下雪、有霜，就为零距离
The next generation keyboard, future keyboard!
challenge and subverting the global computer keyboard, keyboard music instruments in 25 years ago，
The pioneer of the Chinese people firstly entered this area. who sent it into the modern house of CEO of Microsoft?
To challenge AT&T of the United States by improving communication deficiencies
Improving communication deficiencies, Chinese people challenge AT&T of the United States.