Garmin Alpha 200 GPS Dog Tracking HandheldFeatures * Pre Loaded with AU TOPO Active Map * Tracks up to 20 dogs (with purchase T5x or TT15x collars) * Track and message other paired Alpha devices * 3. 5 inch high resolution touch screen * 6 Buttons design for easy operation * Fully waterproof * Rechargeable system with user replaceable battery * Up to 20 hours use in standard tracking * 1 year warranty Measures dogs speed and distance travelled Dog Trails: Choose from three views: Complete