Wholesale From China illuminated sign board Name:LED channel letterl advertising sign Material:aluminum back plate, aluminum letters with acrylic face with small neon letters. Usage: Outdoor Power:Input:110-240V AC,Output:12VDC Size:5000x1000mm 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.