PetSafe HBC11-11050 Bark Control Collar, Battery, Lithium Battery, Synthetic, Black

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 lb. One center black plastic sensor probe. Manual and video included.