Unnecessary nuisance barking in your kennels triggers a piercing ultrasonic correction tone which distracts your dogs from barking. They learn that their barking causes a piercing correction tone; this stops unexplained boredom barking altogether. Absolutely harmless, but works as well as electric shock, for all dogs. Improved model UKS4 features advanced bark discrimination circuitry, louder corrections and user adjustments. Operated on 110 electrical outlet.
