Sonocaddie v300 golf gps if your serious about improving your game the sonocaddie v300 golf gps is the ideal golf accessory to have it uses the most advanced high tech gps satellite system and can calculate the distance from any point on the course to the green or any other target you wish to set using a yardage guide with course layouts this works in real time so as you move your position is shown and your location and distance to critical targets is updated the golf gps has a distance