led writing board good quality and low price 28-48 flashing modes and multi colours lifespan: 80000 hours fashionable About us:Our company, Guangzhou Dingshengshiye Electronic & technology Co.,Ltd. is a manufacturerof LED writing boards, LED light boxes in China. Our products has been exprorting to UnitedKindom, Germany, Russia, Malaysia, Thailand,Hong Kong, South Africa, South America,etc.We ...