Oklahoma Sound PRC-400 Jumbo Presentation Cart, 33" Length x 21" Width x 40" ...The new PRC400 Jumbo Presentation Cart is a multifunctional, robust cart with ample storage and display space for audio visual equipment like laptops, projectors and document cameras. The extra large work surface and optional broad, adjustable side shelf make for easy set up for all presentations with easy access to your equipment. Safely protect all of your valuable AV devices in the spacious locking storage cabinet with an adjustable (or removable)