Our company some time ago bought a batch of Marine CCTV back to the monitoring equipments in our company before all to change, then select the Marine CCTV I give our leaders to recommend, but I have a friend monitoring equipment of experts in this field, but I asked him to do to the staff of our company, but if this is not my friend estimates of us who are not professional to buy monitoring equipment will not buy such a good quality, more is not the kind of price concessions, this is the first time I get such a high quality and inexpensive things, because this thing our leaders also say I work reliable.