Rarely have the opportunity to use this solar energy monitor, but this is still using the power supply , feel very good, very good, but this is mainly because there is still an activity this is our school, feel the power supply . Also, there will still be some security, it is for the safety of children is really is the installation of the solar energy monitor a lot of it, it really is very clear, no dead ends, so I feel this will install the solar energy monitor also it is very to install it, parents are still very reassuring, said the solar energy monitor is a very good use.