Whether it is a monitor in the street or in the building, it is indeed very good, to improve the safety of skill is very good, but I just know there is a solar energy monitor the monitor really is very good, because the resolution is clearly a lot of pictures, what things more clearly, there are solar energy monitor this also can be installed in the mobile phone on a software, it also improves people wherever a safety performance is good, is it really is very good, so I think this installation is very necessary, nip in the bud is still very necessary, so still very good.