an inner built antenna. the efficiency of the receiver is straight connected to the antenna size ( the larger the better).one type is the internal patch antenna, which is a square conductor fixed over square piece of metal. the benefit of…

walkie-talkie features. there is even a unit that allows hunters to track their dogs.the fourth category of garman gps products are those designed for general fitness. for runners, there is the above-mentioned forerunner, which is basically a garmin gp…