• Expandable to a 3 dog system by ordering "Add on" collars
• 16 levels of Momentary Nick or Continuous Stimulation, plus simultaneous Vibration/Stimulation or Vibration only
• Collar is powered by a rechargeable Ni-MH battery system - charger included
• Digital Technology Transmitter with up to a 1 mile range
• Maxx-Range Internal Collar Antenna System
• Fits small to large dogs
• Completely waterproof collar - Waterproof Transmitter and it FLOATS!

The all new H2O 1820 PLUS series is a great new collar system that can be used in a wide variety of applications. This fully waterproof unit covers both basic and advanced training needs for both professionals and novice users alike. Whether you are knee-deep in cold icy waters or knee-deep in tall grass on a dry sunny day, the H2O is designed with the harshest environments in mind. Our revolutionary new Positive Vibration and Stimulation, or only Positive Vibration are standard on H2O 1820 PLUS models.  All H2O 1820 PLUS series models have an 1800 yard (1 mile) range and come with completely waterproof and rechargeable (Ni-MH batteries) transmitter and collar units. Nick and Continuous Stimulations come standard on every model in the H2O 1820 PLUS series line-up. * Patent Pending Features Positive Vibration, 1800 Yard (1 Mile) Range 16 Levels of Intensity adjusted from the Transmitter Digital Technology to Maximize Power Maxx-Range™ Internal Collar Antenna System Gentle Touch™ System Extra Mild Stimulation Built-In Safety Shut-Off Rechargeable Ni-MH Battery System Completely Waterproof Transmitter (Floats) and Collars Hard case, charger, owners manual Limited Lifetime Warrantee