The public security display wall systems primarily displays Geographic Information System (GIS), Global Positioning System (GPS) signals, as well as and high-resolution road monitoring digital maps signals. The main advantage of the ultra-high resolution, ultra-high contrast video wall, combined with flexible signal management capabilities of GIS, GPS, and radar surveillance systems offers a variety of real-time satellite positioning signal for clear information display on the video wall.  The electronic map shows the exact position and orientation of patrolling vehicles.

Many public areas including town centers, roads, airports, public transportation all use Closed Circuit Television (CCTV) cameras extensively, 24/7, to record images and feeds.  Strategic monitoring in a local monitoring suite at different times allow for all signals to go back to central control and command center for real time monitoring and playback for forensics.

Combined with a variety of other information collected by the system, such as real-time video monitoring signals, key and critical road sections and junctions feeds, video conference, dedicated traffic information etc., SALI’s professional display system is able to provide real-time, ultra-high resolution, accurate guidance for an integrated command and control center for decision making.

SALI® Electronics, as early as 2005, adopted 84 "high-resolution dual lamp DLP Display system. This was successfully implemented in the National Police in China. It is an earliest example of the most mature large-format, high-resolution video wall. The projection cube features dual-lamp redundancy combined with an advanced automatic detection system. Should one lamp fails, it will quickly switch automatically to another backup lamp. The projection cube also adjusts automatically, ensuring consistent color and brightness. This can avoid operation complexity, and is an effective way to reduce the system supporting costs and maintenance difficulty.