Item received largely on time, even ahead! Very easy to use and works very well (to be confirmed over time), the collars are big enough for two big dogs. For my labrador cross dog husky and (having already paid a bark collar to spray) the vibrator is more than enough, the ring also impresses. For a young rottweiler 2 years old, with no experience, the discharge is necessary. Considering the price, I am satisfied with the product even if it does not last forever.
