Indoor Dual basic colors/monochrome display system is special for the bulletins or ads uses at various business halls, office floors, banks, security exchanges, hospitals, etc. It adopts distributed scan and modularize design to improve the stability and dependability of the system. The display board specifications include φ 3.75, φ 5.0, φ4.8 and φ 3.0, etc. Each luminous point has 256 grades of gray scale for red and green respectively, which constitute 65536 colors. It can display various tables, curves, pictures (stock market quotations, stock analysis, saving interests, foreign exchanges), etc, or display Beijing Time, weather forecast, news, current affairs, at the same time also can show display modes or controlled time or fake-color pictures.

Pixel center distance	φ3.0	φ3.7	φ4.8	φ5.0
Diameter	3 ㎜	3.7 ㎜	4.8 ㎜	5.0 ㎜
pixel density (Dots/M2)	62500	44320	27490	17220
LEDs in pixel	1R+ 1G or 1R
Brightness adjustment	Manual or automatic adjusting according to the   ambient brightness
Optimal visual distance	3M — 100M
visual angle	Horizontal ：   ± 90 0
visual mode	VGA640 × 480 、 800 × 600 、 1024 × 768
Drive mode	1/16 Constant current driving
power supply	220V ± 10% ， 50Hz
Scan frequency	240HZ
power supply	220V ± 10% ， 50Hz
Operation Temperature	-20°C ～ ＋ 70°C
communication distance	≤ 300 M
weight (Kg/M 2 )	35kg /m 2
Average service life	50 thousand hours