Callaway GPS products are a special type of global positioning system devices from Callaway Golf. Obviously, these instruments are exclusively for golfers. These devices are used for functions such as that of rangefinder. Very often they are referred to as Skycaddie or Callaway uPro. Like any other GPS device, Callaway GPS instrument also collects the information sent by GPS satellites. The information collected by these devices is then suitably altered or deciphered through a software program that forms part of the device. Callaway GPS devices include the bluetooth technology, i.e., the information is received and relayed through wireless methods.