Dogs No Bark Collar for Medium to Large Dogs Batteries Included

No Bark Collar Batteries Included. Features: Adjustable Sensitivity 7 Leves of Tone and Shock Stimulation Extremely Mild, Brief Shock Only Applied When Dog Doesn't Respond to Tone Teaches Your Dog Not To Bark Safe For Dogs From 10 to 120 Pounds Not Reccommended for Dogs Smaller than 10 Pounds.