Dear Buyer. Our astro is the premier high-sensitivity GPS-enabled dog tracking system for sporting dogs. This unique system pinpoints your dog’s position and shows you exactly where he is, even when you can’t see or hear him. Includes the newest, upgraded DC-40 transmitter collar! Here is our Best wholesale prices, Warranty policy, Return policy, [email protected] [email protected] SportDOG TEK 1.0 LT Series GPS Training Collar (12 Dog Combo) Cost $2,700 USD SportDOG TEK 1.0 LT Series GPS Training Collar (11... read full review »