Often promote energy saving and emission reduction now, some would call an hour saving approach, so it is less pollution, can save some energy, probably because of this, so the solar energy is the monitor for energy conservation research, it is quite interesting, this software is really very good a useless, is a thing can use solar energy, so solar energy monitor is still a very good use, one thing can be charged, so I think it is very good, after use feel or listen to good, or good, is really a lot of convenience, or listen, is really very good.