"Train your lead hunting dog with the Garmin Alpha 300 Handheld with Alpha TT 25 Tracking and Training Collar System Bundle and the rest will follow. When paired with compatible dog collars (only 1 training collar included), the handheld unit lets you track your pack when they're on the hunt, and it lets you train them when you're gearing up for the next hunting season. The Alpha 300 unit from Garmin can monitor up to 20 dogs and has an impressive 9-mile range. Its easy-reading, 3.5"" touchscreen display boasts a 2.5-second refresh rate. The handheld's easy-to-understand, button-operated training functions include 18 levels of stimulation and tone or vibrate when paired with the electronic collar. Since it's a Garmin, you can access GPS navigation features, such as preloaded TopoActive maps, satellite imagery, 3-axis compass, and a barometric altimeter. Up to 55 hours of battery life. Able to monitor up to 20 dogs Impressive 9-mile range 3.5"" touchscreen display 2.5-second refresh rate 18 levels of stimulation Tone or vibrate functions GPS navigation features"