GL- Perma Series P-3.9 is an indoor, permanent-install LED video panel with a 3.906 mm pixel pitch and a 500 x 500 mm die-cast aluminum module frame. It delivers up to 750 nits brightness, a 3840 Hz refresh rate, and 16-bit grey depth across a 168 x 168 panel resolution. The 40 mm thick, 10.5 lb panel supports front and rear maintenance and curved layouts (concave/convex) using 250 x 250 mm LED modules for a slim wall-mount appearance.