... controlConnect High Speed Dome camera with the RS485, the Keyboard can switch between cameras freely, control the Auto/manual, set parameters and lens. Multi ... are: HI, DA, DR and customized protocols etc.2). Support the RS232 and RS485, RS232 hardware installation is selectable.3). Multiple ... switched by a keystroke.6.). Buzzer sound on/off in the menu of Keyboard7). Backlight on/off, or off delay3 . ...