Yeastar is a developer and manufacturer of IP-PBX, VoIP gateways, and IP video surveillance products. As a division of Yeastar, Recovision specializes in IP surveillance system, having an energetic R&D team with profound knowledge and rich experience in IP field.The NVR surveillance system is easy to use, reliable and cost-effective products can surely meet any demands from mass consumers; customization with rich features can also help you nail down projects. It will be your trustworthy partner in Surveillance market.