... 2.colorful LED lights 3.Mitsubishi optical light guide panel. HS-double side led display boardFeature:made of high-grade aluminium ... , anti-scratch, fade;e hss, can be wiped off easily;Visual effect:dazzling colors, flashing screen, capture customer's attension directly ... , such as: bar, KTV, disco, coffee shop, supermarket, shopping mall HS-double side led display board