The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. What types of chairs will work with the Wonder Tray? The Wonder Tray is compatible with most four-legged couches, chairs, lift chairs, and recliners that are 20-32 inches deep. The front and rear leg must sit on top of the bas pads to hold the tray in place. Please measure your furniture before buying. Can I use the Wonder Tray without a chair? No, the Wonder Tray is not intended for free-standing use. It must be installed underneath a couch or chair to be held in place. How is the Wonder Tray different from a traditional TV tray? The Wonder Tray sits underneath your furniture so as to not be in the way when not in use. It swivels and rotates 360 degrees to conveniently be placed in front of you. How large is the Wonder Tray? The table top measures 20 inches wide by 15 inches long. The base can adjust from 20 to 32 inches wide, and the tray adjusts in height from 20 to 30 inches tall. What is the difference between the Wonder Tray and Wonder Tray XL? The Wonder Tray XL comes with a larger tray and two accessory items, including a cup holder and laptop wedges.