I researched a lot of RTC's and sellers before committing to buying my SportsDog 1825. I wanted range, exceptional control, ease of use and if there were times I needed to deliver an aversive, it could be done without causing any possibility of injury to my dogs. Mr Larry Krohn whom I believe to be one of the premiere RTC trainers in the world says it so eloquently: The RTC (e-collar) is the telephone, the clicker is the invitation and the reward is the party. Call your dog and let him know there's a party going on over here. This collar system is the perfect caller when used as it should. It can be dialled down to such a low stim that all it says to your dog is "Hey, I'm talking to you" and up to 1600mtrs away - WOW what a system. I could not recommend it any higher. Simple to use, simple to do everything you want in the balanced dog training world.