Check the listing for details. Trail Tech - 922-123 - Voyager Pro GPS Kit. Condition: New. Listed at 649.95 USD. The next evolution of Trail Tech's most popular off road GPS, featuring patent pending Buddy Tracking, Bluetooth for phone and media connection, 4" color touchscreen, and full vehicle integration. Buddy Tracking connects multiple Voyager Pro devices to a private location tracking network. Once connected to the buddy group, you will see markers showing the name and location of all group members. No cell signal needed, the Buddy Tracking works using sub-gigahertz radio signals. The technology supports up to 20 riders in a single group. In order to enable the buddy tracking feature you must install the external vehicle to vehicle antenna. The mesh network capability increases the comfortable following distance between you and your buddies. The typical antenna range between buddies is .5 to.