The iGTR is about the size of a small paperback book, weighing 3 ounces and measuring 2.75 inches wide, 4.25 inches long, and a half-inch thick. A compartment on the back accepts four AAA batteries (included), and there's an optional AC adapter input on the bottom. A detachable clip is included in the box, which snaps on to the back of the iGTR and lets you walk around your house like a rock star.
