Detailed Product Description Full Color LED Billboard (Leading Supplies)Indoor - pitch 3.5mm, 4mm, 4.2mm, 4.4mm, ... 25mm, 28mm, etc Project Information Yaham patent control systembetter color revivification, more exquisite video display because of advanced technology ... 16*16 pixels per moduleLEDNichia LED utilized for better color uniformity, better brightness uniformity, higher electricity-to-light ...