Bundle includes TT 15 Dog Device – a top-mounted, high-sensitivity GPS/GLONASS receiver that uses 18 levels of continuous momentary stimulation, plus audible tone and vibration, activated from accompanying Alpha 200i Handheld Features sunlight-readable 3.5” capacitive touchscreen display and a button-operated, dog-focused design for quick, minor adjustments Easily set up and monitor up to 20 dogs from up to 9 miles away with a 2.5-second update rate by using multiple global navigation satellite systems (GPS and Galileo) Dog list and group management lets you keep inactive dogs in the system for easier setup Interactive SOS alerts and two-way messaging via the 100% global Iridium satellite network (active satellite subscription required; jurisdiction restrictions may apply) Preloaded TopoActive maps, direct-to-device BirdsEye Satellite Imagery downloads and built-in three-axis compass and barometric altimeter User-replaceable battery lasts up to 20 hours; up to 15 hours with inReach technology enabled 18 levels of correction, including vibration and adjustable tones Backward compatible so you can keep your existing collars and other Alpha compatible devices; transfer location data between compatible Garmin devices Hunt Metrics data shows each dog’s daily hunting patterns and behaviors per hunt so you can take measures to keep them healthy and safe