PET GENTLE

I bought this device  that I saw on facebook .  When I would let Coal out at night he would run and bark, this pet gentle is aimed at him and I say no and he stops . It seems to work great..I also been ignoring him at 200am when he starts to wine to go out and he does't cry again till about 530.....as you see I am on my blog............well saying goodbye I.m going to try to go back to sleep