Wholesale China Market outdoor programmable led signs Name:LED channel letter sign Material: Aluminum backer and sides, acrylic face and vinyl. With alumium back plate. Usage: Outdoor Power:Input:110-240V AC,Output:12VDC Size:910X6800MM Style:LED front lighting Certificate:CE,UL ONLINE SERVICE SKYPE:luyanfeihelen LED Front-lit Channel Signs is the most common type of illuminated signs; it can be very good to show the contours of the sign even in the night. Basically, light passes through the front face of the sign causing it to light up at night. Found in 2005, Dragon Signs Technology Co.,LTD is specialized in manufacturing, designing and developing outdoor LED signs ,metal signs etc, we are a UL certified sign manufacture in china.