tracking units Nov 5, 2005 0:45:22 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by redsimms on Nov 5, 2005 0:45:22 GMT -5 fixing to buy a rd 400 friend has one and i have found a 2 collar unit for 494.99 free shippingfound it at www.mygoodpuppy.com