1. Dot Matrix: (1) Size: 8*8, 5*7, 0.7, 1.3, 1.5, 1.9, 2.3, 3.0, 4.0 (2) Color: Single color / Bi-color / RGB color; Cathode or Anode 2. Digit: (1) Size: 0.3, 0.4, 0.5, 0.6, 0.8, 1.0, 1.2, 1.5, 1.8, 2.0, 2.3, 3.0, 4.0, 5.0, 7.0 size (2) One digit, Two digit, Three digit, Four digit, Red/Green, Cathode/Anode 3. Cluster: (1) Size: 4*8, 8*8, 8*16, 16*16 (2) Color: 4*8(1R3G/4R/2R1G1B); 8*8(4R/2R1G/2R1G1B); 8*16(2R1G/2R1G1B)