This handy window-mount unit has a suction-cup base with a locking clip and includes a mount clip that is compatible with the Astro 320, Astro 430, Alpha 100 or Alpha 200. It features a bendable, flexible arm that is just under 9 inches, so you can adjust your Garmin to the perfect position while hunting from your truck or while driving. The ball-mount tip fits many Garmin products and the included MountClip is compatible with the Astro 320, Astro 430, and Alpha 100. Just slide the MountClip onto the back of your handheld for a safe and secure mount. The MountClip also accommodates your AstroCover or AlphaCover, so there's no need to remove your cover when mounting your handheld in your vehicle. As an added feature, this Window Mount also accommodates the DriveTrack 70 with the purchase of an optional MountClip-DT (sold separately). This additional MountClip allows you to easily switch between your tracking system handheld (Astro or Alpha) and your DriveTrack. Made from sturdy, heavy-duty materials that are built to hold up to your roughest hunting conditions.