From the Manufacturer:

Dahua Technology Co., Ltd. is a provider of video surveillance products and services, with the world’s 2nd largest market share, according to a 2015 IMS report.

In addition to its core video surveillance product line— network cameras, NVR, HDCVI cameras and HDCVI HCVRs—Dahua also offers a full range of solutions, from intercoms and alarms, to motion sensors and access control.

Dahua Technology provides video surveillance solutions that are applied in many markets, including banking, public security, energy, telecommunication, intelligent-building and intelligent-transportation.