Dot Matrix LED Unit for Indoor Use LT1550ED(Chip Type) n Features ÁNo. of dots : 16532dots ÁOutline dimensions : 64.05128.0mm ÁDot size : 3.053.0mm ÁDot pitch : 4.0mm ÁRadiation color : Yellow-green+Red(dichromatic type) ÁDriving method : 1/16 duty dynamic drive