Go to friend’s home to play when I installed the monitor to see friends home, I asked a friend what her family have installed the monitor, a friend told me her home to install the monitor is solar energy monitor is quite good, is she a friend recommended it to her, listen to a friend and I said I know before about solar energy monitor is very good, but the price is not cheap. Friends listen to what I say is the main energy saving, said she did not consider the price, is using the solar energy monitor is a thing is made for environmental protection, and listened to the friend said the and I said it was a good thing, I also to my home to install a sometime.