I am Sally, sales manager from Raysharp, a global top 50 security manufacturer which is specialized in CCTV OEM/ODM business over 17 years. IP cameras, Raysharp also manufacture NVR, DVR, HD analog cameras, PTZ, Junction box, Switch, WIFI battery kits. I have over 16 years' experience in CCTV field, any questions, I'm happy to help.