LED writing Boards can work in nights and days. 
Especially Dazzling in dark environment. It is most often used in restaurants, shopping mall, coffee shops, bars, or night clubs and very public places, they are ideal for advertising daily specials, drink specials, upcoming events or promotions. 
It could attract consumers easily and achieve the goal of promotion.
You could write any characters and design graphs with a fluorescent marker pen optionally.
Write on and wipe off easily, when the power supply is on, the content on the board will reflect gorgeous colors like different chromatic neon lamps.

Detailed Product Description
7 colors of RGB, 38 kinds of flashing modes 

Main Specs of Board:
Frame Material: Aluminium alloy
Writing area material: High quality Acrylic
Light Source: SMD 5050 RGB high brightness LED
Power Supply AC: 100-240V, DC:12V
LED LifesSpan: 50,000+ Hours
Size: 60cm x 80cm ( 23.6″ x 31″) 

Package contents:
1. One LED Fluorescent Board
2. 12V DC Adaptor
3. Clearing cloth 
4. Maker Pens 
5. Triangular Easel
6. Instruction