Reviews Description: Sonocaddie is the perfect, lightweight handheld GPS device that clips right onto your waist or golf bag to help you better manage your golf game. Download and store up to 20 golf courses at one time from your laptop or PC, free unlimited downloads and ability to share course info amongst other Sonocaddie users. The units calculates the distance from any point on the course to virtually any reference point including front, center and back of each green. Choose from over 13,000 courses currently mapped worldwide or map your own and upload to the website. Edit exisiting course information to suit your game. Operates on 3 Alkaline batteries that are included, simple downloads from your PC or laptop using USB cable provided, Vista compatible.