DT Systems Master Retriever 1100 Dog Training Collar - Dependable and Tough, and the DT Master Retriever 1100 is no exception. Built with rugged durability in mind for those long days in the marsh, and outfitted with Mossy Oak Blades camo, the DT Master Retriever 1100 is ready for the field. 1100 Yard Range with compact antenna technologyCompact, lightweight, 100 Percent waterproof collar is fully rechargeableExpandable to 2-dog or 3-dog system (with easy turn dial)MAXX-Range 360 Internal Collar Antenna SystemFully Waterproof Transmitter-Remote (uses 9v Battery)16 intensity levels of Gentle Touch Nick and Continuous e-StimCamo