When I see this is because of a solar energy monitor promotional activities, so prices immediately called my friend I see, my friends always say that they want to buy such a solar energy monitor, when the phone I was worried that if he can buy what to do, I a friend was not home purchase of solar energy monitor, or so he preferential prices but there is no way to enjoy the home, originally all these products but to see such a preferential price I chose to give the home purchase, haha now use this to a solar energy monitor know what is the faster speed, instantly understand this product why is everyone so popular.