1) Chips sourced from Taiwan
2) Fire proof REF
3) Imported PCB
4) Fits different LED display size specifications

Series:
1) Φ1.9, 5 x 7, 8 x 8
2) Φ3.0, 5 x 8, 8 x 8, 16 x 16
3) Φ3.75, 8 x 8
4) Φ5.0, 5 x 7, 5 x 8, 8 x 8
5) Φ10.0, 5 x 8.