This is a high-quality piece of rolling carry-on luggage outfitted with a removable AC-powered three-piece speaker system. It provides tone controls and mixable mic and line inputs, and a special output jack lets you boost output by daisy-chaining multiple bags.

The Boom Bag's 18-watt amp and 4-inch woofer lack the brawn to fill a large room, but they produce a healthy 101 dB at 12 inches, rivaling some desktop megasystems. The bag also boasts a wealth of pockets and compartments, enough room for a projector or printer, and a separate nylon attaché large enough to hold a 17-inch notebook. The Boom Bag isn't for everybody, but it'll certainly simplify your life if you frequently make off-site presentations in moderate-size rooms.