Izzo's Swami GPS Unit Golf GPS unit for beginner to intermediate golfers for calculating distance to the front, center, and back of the green Stores up to 10 courses at a time; compatible with more than 12,000 U.S. courses Fast Insta-Lok technology; large easy-to-read display and 4 intuitive buttons Easy-to-use PC connection for downloads and charging; rechargeable lithium battery Runs for at least 12 hours per charge; measures 3.75 by 1 by 2 inches (W x H x D)