● It can not only control PTZ directly, also HIKVISION embedded DVR, switch conveniently. ● Any device under RS485 main line can set different protocol and baud rate, which add agility of the system. ● English & Chinese OSD menu, according to the protocol and baud rate. ● Substitute all of the function keystoke of embedded DVR. ● Use metal surface and imported button which makes good hand feeling, and confirmation voice note. ● It can control 31pcs embedded DVR, 255pcs PTZ at the same time. ● Controlling the parameter setting with password, which will devise it wrongly. ● Multiple normal PTZ protocol. ● RS485 input/output use Photoelectric isolation, which makes long transmitting distance 1200m