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How to use? offer markers with writing board, write something on the board, when the power is on, the content will be flashing and shinning with functions and colors, and be easily clean off with cloth and duster Application place: shopping mall, shop, restaurant, supermarket, and so on.. advertising and promoting for you. Advantage: 1. super bright(have special technology comparing with other suppliers because we have been engaged in this area for nearly 5years and 4years on alibaba) 2. high quality wihtout any scratches on the surface 3. the content on the board shinning and flashing 4. Ce certificates for the whole products, not only the adaptor(most suppliers have only CE certificates for adaptor) 5. lowest price and sample approval 6. 4years on alibaba, reliable legal and professional 7. many spare parts: markers adaptor chain duster cloth hook and so on 8. PS smooth and perfect frame compared with the traditional sharp aluminium-alloy frame it is not sharp more safe and smooth led writing features1) Inside of the board there'stwo RGB led strips along the long sides of writing board which contorlled by circuit board. 2)13colors, and 40functions. There is a button to control the functions. The content you write on the board can be flashing and shinning with the colors and functions. 3) write part : high quality acrylic can be used many many times without any scratches. 4) erase easily with soft cloth and duster 5).Normal size:A1(57x84cm),A2(42x57cm),A3(28.5x42cm)or make as per your design6) one year guarantee lifespan of leds : more than 100000hs7) spare part: markers, adaptor, duster,chain,hook,cloth and so on. 8)With ROHS CE UL GS SAA BScertification. 9) the size and shape can be OEM 10)the frame thickness is only 25mm,PS frame compared with the traditional aluminium-alloy frame it is more smooth and safe not sharp. 11)low power consumption can save energy and money 12)Evironmentally friendly:All the material is ROHS certification,it can use like blackboard,can write and erase for many times.13)power supply, offering different adptors for different countries, with CE UL GS SAA Bs ROHScertificates.