D.T. Systems H2O Beeper Add-On Collar Replacement collar for the h20 1850 with beeper for the locate, run and point features Up to one mile range; lightweight, waterproof collar Maximum 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 Black color Add-on or Replacement Collar/Receiver for the H2O 1850 and 1850PLUS Lightweight waterproof collar and transmitter 16 levels of intensity, adjustable from the transmitter Beeper with locate, run and point and point only modes