If I was you get the 3225....farther range........As far as using it, it is pretty simple. Buttons and toggle switch to push for each dog. Toggle swith up controls 3 dogs, toggle switch down controls the 3 other dogs.
Dial on the transmitter controls the intensity level........Button under transmitter also can be set for 4 different stimulation levels.
Here is Manual for 1825:http://www.sportdog.com/SportDOG/files/ ... 386a91.pdfHere is Manual for 3225:http://www.sportdog.com/SportDOG/files/ ... 58f789.pdf
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