I kept getting this sponsored add up on Facebook from this company, about the most cruel anti bark tool for dogs (using ultrasound). I wrote why it is cruel and very wrong to use this type of equipment - and they blocked me. Before they blocked me, I had noticed that they had deleted all negative comments on their add. Don't use this company - they don't deliver on time (so say's many) and they 'hide' unhappy costumers comments.