D.T. SYSTEMS H2O Receiver Collar Stocking UPC : 671880615914 UPC : 671880615914 allowing easy adjustment without having to disassemble the rail mount brackets Key Features:• Digital Technology• Adds to any H2O 1800 PLUS series training system(excluding Beeper models)• Replaces any lost or damaged H2O 1800 seriestraining system (excluding Beeper models)• Up to 1800 yard (1 mile) range• Lightweight and waterproof• MAXX Range Internal Antenna System• Rechargeable Ni MH batteries• Built in safety shut off system• Available Limited Lifetime WarrantyPackage Contents:• 1 x Collar Unit w Green collar belt• Double jack Cable This Add On Collar can also replace a lost or damaged collar for all H2O 1800 and 1800 PLUS series systems (excluding Beeper models)