This unit can operate on 230VAC with an AC adaptor available from us. Manufacturer's limited warranty Bark-Free is not guaranteed to reduce barking in every situation with every animal. If your dogs are basically normal and well adjusted, not mentally ill chronic barkers or high strung and hyperactive, you can significantly reduce the nuisance and boredom barking, especially when you are away from home or at night. The units can be used at field trials or on the show circuit by using an auto cigarette lighter plug. The sensitivity can be adjusted.
Larger dogs react better to lower tones while smaller dogs have a better reaction to higher tones.
Use the lowest possible sensitivity setting that will respond consistently to barking. Please do not harass your dog to test the unit. 50 ft. power extension cord included Two year limited Manufacturer's Warranty Ideal for use in kennels, in multiple dog homes, for persistent barking problems, to train puppies not to bark, to keep your dog or the neighbor's dog quiet. Quantity We welcome suggestions about other products compatible with our goals. If we add the new product to our site we will send you a thank you gift.