Above All Advertising’s Rol-EE portable outdoor digital signage comes with its own set of wheels and can be rolled over everywhere with ease. The mobile digital signage works on battery making it the perfect product for outdoor events. With 16-20 hours of battery life, this digital A-frame sign can function for the entire day. For more information, contact Above All Advertising, 6980 Corte Santa Fe, San Diego, CA 92121;. (Web Site) www.abovealladvertising.net