Demaron No Bark Electric Shock Collar for Dogs, No Harm Anti Bark Collar & Training Device with Beep/Shock, Water Resistant, 7 Adjustable Sensitivity Levels EXTRA BATTERY INCLUDED so your dog collar doesn't run out of power SUITABLE FOR DOGS BETWEEN 15-120 LBS this no bark collar would NOT work well for tiny dogs WATER RESISTANT & PET FRIENDLY the shock collar is water resistant but not water proof. Rain is fine but not more than that. The collar is humanely prevents excessive barking without hurting your pet. 7 SENSITIVITY LEVELS Demaron electronic no bark dog collars has 7 levels of intensity. Through each level intensity gradually increases until the dog stops for thirty seconds. DONATION to HUMANE SOCIETY is made on your behalf when you review this anti bark collar for dogs. 1 minute of your time is $1 towards a good cause!