PetSafe premium bark collar features 6 levels of static correction that automatically adjusts to your dog's temperament, starting at the lowest level. Correction level increases progressively with continuous barking.

General Info: Correction level or volume is around 120 dB at one foot from the transmitter Emits high pitched tone as correction that is not audible to humans Battery will last up to 6 months or about 2,000 activations Uses microphone to sense for barking Light flashes as a low battery indicator Light comes on to indicate correction Can be mounted on a wall or set on a table/floor