Have a professional friend is particularly convenient, when I buy monitoring equipment let my friend to accompany me to see my friend, but inside this industry didn’t work on youth, this product is also a certain understanding, then because I listened to my friends the proposal to buy HDB CCTV, or I don’t know the HDB CCTV not only the quality is very good, and is especially powerful, the most important is the price than I was also low budget, if not my friend to accompany me to buy monitor, do not know I will come back what to buy a brand, but certainly is not as good as CCTV HDB.