DT Systems H2O 1810 or 1820 Add-On Dog Training Collar Black Orange and Green Options

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Use the DT Systems H2O 1810 or 1820 Add-On Dog Training Collar to make your H2O 1810PLUS or 1820PLUS a multi-dog system.

Add-on or Replacement Collar/Receiver for the H2O 1810PLUS or H2O 1820PLUS. Available with your choice of Black, Orange, or Green collar straps. Black is recommended if you need to replace the original collar/receiver that came with your H2O system. Orange and/or Green are recommended to expand your H2O PLUS unit to a 2-dog or 3-dog system.

Adjusting and Positioning Your Collar for Proper Fit

All electronic collars need to be very snug to work properly. They must be just tight enough to allow the “prongs” or electrodes to make good skin contact.

  • If your collar is too loose, the stimulation may not work properly because good skin contact is not being achieved. This can directly affect the stimulation performance and whether or not the dog will receive the stimulation. Always check for good “prong” contact if it appears that your dog is not responding to the stimulation.
  • A loose collar can promote skin irritation from moving or rubbing too much on a dog’s neck while they are running or training. The proper snug fit will help prevent this from occurring.
  • Proper fit of the collar is important. It should be just tight enough on the dog’s neck to make good skin contact and allow the dog to breath normally. The collar should never be so tight on the dog’s neck that it restricts the dog’s normal breathing pattern.
  • For proper positioning of your collar receiver box, it should be placed on the center of the dog’s neck.

To learn more about how the DT Systems H2O 1810 or 1820 Add-On Dog Training Collar integrates multi dog set-ups read the H2O 1800 Series Owner’s Manual.

  • H20 1810 and 1820 ADD ON Collar units
  • Easily programmable to existing H20 1810 or 1820 Transmitter Remotes
  • Fully Waterproof and rechargeable
  • Adjustable collars to fit Dog’s necks from 8″ to 25″
  • Collar Unit Measures- 2 5/8 in. x 2 in. x 1 1/2 in., Collar weight 8.2 oz. (with belt)
  • Model: H2OADD
  • Manufactured by: DT Systems


  • Lightweight
  • Waterproof
  • 16 levels of intensity, adjustable from the transmitter
  • Nick and Continuous Stimulations
  • MAXX-Range Internal Antenna System
  • Rechargeable Ni-MH Batteries
  • Available with Black, Orange or Green Strap