SkyCaddie SG2 Golf GPS (Black) Golf GPS unit designed for avid golfers who want advanced capability Includes IntelliGreen technology with full depth and shape of the green from any angle of approach Plot greens yourself, or subscribe to one of three SkyCourse memberships for access to up to 16,000 courses Large, easy to read numbers; simple to use as a cell phone or remote control Rechargeable battery provides up to 10 hours of continuous use