When selecting P10 LED modules, the most critical factor is the Pixel Pitch (10mm), which determines the optimal viewing distance (typically 10 meters or more). Buyers must distinguish between DIP (Dual In-line Package), which offers higher brightness and durability for outdoor sunlight, and SMD (Surface Mounted Diode), which provides wider viewing angles and better color mixing for indoor or semi-outdoor use. Ensure the Refresh Rate is at least 1920Hz to avoid flickering on camera, and verify the Brightness levels: indoor modules should be 600-1200 nits, while outdoor modules require 5000-7000 nits to remain visible under direct sunlight.