A top-mounted, high-sensitivity GPS receiver, TT 15 dog device uses 18 levels of continuous and momentary stimulation, plus audible tone and vibration activated from Alpha 100. Compatible with Astro 430 and 320 for tracking only. Rugged and water-resistant to 10 meters, the tracking and training dog device with collar is tough enough to run wherever your dog runs, up to 9 miles away. The stimulation features let you train each dog separately traditional stimulation allows you to make quick changes (low, medium, or high) within a predetermined stimulation level (1-6), whereas linear stimulation allows progressively more stimulation from levels 1 to 18. You can remotely operate the LED beacon lights, built in to the dog device, to help locate your dog in low-light conditions.
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