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 WARNING: This product can expose you to chemicals including 1,3-butadiene which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
