The Garmin magnetic mount antenna is just what you need in order to keep track of your dog with the Garmin Alpha and Astro handhelds while in the car. The mount will enable you to mount the antenna on any metallic surface to provide better reception so you are able to keep track of your dog. This powerful remote antenna magnetically mounts to your vehicle and connects to the Garmin Alpha XL, Garmin Alpha 300/300i, 200/200i, Alpha 100, and Astro 430.