For more flexibility on the hunt, the compact Alpha 10 handheld can be used on its own, connected to your compatible smartphone or connected to other Garmin dog tracking collars (sold separately). Alpha 10 works with compatible Garmin dog collars to monitor up to 20 dogs for up to 9 miles (depending on the dog collar) with a 2.5 second update rate. 18 levels of stimulation with different tones and vibrations and pro view compass mode. See your dogs location from the drivers seat of your truck or even from your wrist, pair with the Garmin Explore smart-device app to see real-time dog tracking information, save collections of dog tracks and replay tracks to see exactly what happened during your hunt. Includes spine mount w/wrench kit, belt clip, carabiner clip and microUSB cable.