The SportDOG Yard Trainer is perfect for the pet owner looking for a simple electronic dog collar to use around the house or yard. This small trainer is designed with a maximum range of 100 yards which gives it more than enough reach for basic obedience training. The Basic Trainer has a waterproof collar and a water resistant transmitter so there is no worrying about using the collar on even the wettest of days. The collar operates on 3-volt lithium batteries (included), and has 8 levels of correction plus a separate button for tone-only. The Yard Trainer is a low to medium power trainer which makes it a suitable collar for smaller breeds and those starting with their first electronic dog collar.