How does a wireless fence differ from an in-ground one?

There is no buried wire. A transmitter sends a signal to the collar, and the boundary is a circle around the transmitter. In-ground systems can follow any yard shape but require trenching.

Can it cover a rectangular or L-shaped yard?

Not well. The boundary is circular, so corners and narrow side yards fall outside or inside the circle. It works best on an open, roughly square lot.

Does the dog need training first?

Yes. Most owners spend a week or two teaching the dog the warning zone with flags and supervision before relying on correction. The included guidance is brief, so plan your own training routine.

Will walls or trees affect the signal?

They can. Metal buildings, dense foliage and sloping ground weaken or distort the field, so test the actual boundary with the collar before letting the dog run free.

Is it safe for small dogs?

The collar is sized for medium and larger necks, and the static level should be started low. Check the fit and contact points on a small dog before use.