Easily stay connected to track your whole dog pack across challenging terrain with Garmin's Alpha 300 Handheld GPS. The clear 3½" touchscreen and user-friendly 6-button design, plus topoactive maps and downloadable satellite imagery, make tracking and training your dogs in the field easier than ever. Select from 18 levels of momentary and continuous stimulation and issue different levels of audible tone or vibration commands. Pairs with your Alpha TT™ 25 or Alpha T 20 Dog Collar (sold separately) or backwards compatible TT and T series collars. Imported. Approx. 2½" x 6½" x 1½". Garmin® Alpha® 300 Handheld Dog Tracking GPS