Me and my husband just bought 2 more labs along with the one we had.We are getting ready to train them all,but buying 3 separate training collars would cost way to much money.So we found the Tri-Tronics Sprot Basic G3 and it allows you to train three dogs at once!!It is also water proof and has a range at one-half online medicine without prescription mile.We love it and just the ionamin without prescription fact that you can control three dogs with one remote its AWESOME! Train up to three dogs from one transmitter (purchase additional receiver separately). This trainer has up to 10 levels of continuous or momentary stimulation, plus an audible “buzz” activated with a separate button
See more here:
Doggy Training X3