D.T. Systems H2O ADDON-O Orange Receiver Collar

"Make your H2O 1810PLUS, 1820PLUS, or 1830PLUS a multi-dog system Add-on or Replacement Collar/Receiver for the H2O 1810PLUS, 1820PLUS, or 1830PLUS. 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. Features 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 "
Up to one mile range; lightweight, waterproof collar
Maxx-range internal antenna system in collar belt
Rechargeable nimh battery system; built in safety shut-off system for improved battery life and reduced cost of operation
Blaze orange collar
Add-on or Replacement Collar/Receiver for the H2O 1810 PLUS, 1820 PLUS, or 1830 PLUS
Lightweight waterproof collar and transmitter
16 levels of intensity, adjustable from the transmitter
Built-in safety shut-off system