Namsan LED Flashlight Dog Repeller Training Device Humane solve dogs' barking problems Only suitable for puppy and medium dogs, up to 50lb(25KG), Please be careful this. Suitable for use in hotels, restaurants, courtyards, garages and other places.Power Supply:DC 8.4V,500mA Do not let the ear close to the launch window so as to avoid discomfort Anything please feel free to contact us