Arkon's GN-BKT6000 passive holder is meant to be an addition to or a replacement for an existing holder, and is compatible with Garmin Alpha 100 and Astro 430 and 320 Model handheld dog tracking GPS devices. (These Garmin GPS devices should include a 17mm swivel ball-compatible holder.) This package includes only the replacement or additional passive holder for Garmin Alpha and Astro series GPS. GPS device not included. Attach the bracket to the Alpha 100 or Astro 430 or 320 GPS device, then attach the bracket into any 17mm ball compatible pedestal (also sold separately) to create the mounting solution of your choice. For a complete solution, see Arkon Model RM0806000, which can be mounted to a car or truck windshield.