I used this on my terriers in the past and no longer have a need. I have charged up both collars and put a new battery in the remote. All is working as it should. Check the price on Ebay of this system, some have sold for just one collar by itself for 49.95 and another sold just the wall charger for 59.95. That makes this a steal. If you have a large dog you will need to get some extensions but that is an easy fix. Cash, only, door pickup. Please don't try and low ball. Thank you