Garmin 010-00976-00 Astro 320/DC 40 Bundle Dog Tracking System: * Bright 2.6", 65K sunlight-readable TFT color display (160 x 240 pixels) * Worldwide built-in basemap with shaded relief, supports Garmin custom maps * Birdseye (overlay satellite image) * 3-axis compass and barometric altimeter * Built-in vibration motor to support silent alerts * Wireless dog sharing for easy transfer of tracking capabilities to another Astro 320 * Wireless unit-to-unit data transfer of waypoints, routes, tracks and geocaches with other compatible devices * User profiles including preloaded profiles for different types of hunting, pointing dogs or treeing dogs * Able to track up to 10 dogs simultaneously * Rugged and waterproof * Hotfix support * Automatic time zone detection * True type font support for improved font readability * Up to 20-hour battery life * Requires 2 x AA batteries * Includes extended range antenna for Astro 320