we are interested in import of Led writing board, automatic change 7 colors ,in different sizes, we have special interest of this product in educational field, we can sell 100,000 pcs annually so looking longterm supplier, pls send us your complete product deatils , specs, Quotations,aftersale service terms, different sizes deatils , with MOQ for one size.we will appreciate serious supplier who are looking long term business in this field with quality of product and competitive edge.