GPS/GLONASS dog tracking and training device and collar Dog tracking and training device with 1" collar for use with both the Garmin Alpha 100 or the Astro 320 (tracking only). High-sensitivity GPS/GLONASS receiver has a rechargeable battery. Provides 18 levels of continuous and momentary stimulation, plus audible tone and vibration modes. Water-rated to 10 meters1 and tough enough to run wherever your dog runs. 11ATM -- withstands pressures equivalent to a depth of 10 meters. See garmin. com/water rating for more details.