Petsafe HBC11-11050 Bark Control Dog Collar Texture Tools ReadyFlex technology runs on two

ReadyFlex technology runs on two or four D batteries

Gray color blends with concrete patios

Easy to install using either Marksman tool

Contains Nylar to kill flea eggs and larvae

Petsafe HBC11-11050 Bark Control Dog Collar Texture Tools ReadyFlex technology runs on twoHighlights : Automatically adjusts to your dog's temperament starting at lowest level 6 levels of static correction, progressive correction feature increases correction to next strongest level Uses vibration sensor to sense for barking, sensor probe cannot be removed or adjusted Must fit properly, cannot attach leash to collar Dog should be at least 8 lbs One center black plastic sensor probe Manual and video included