Dazer II stops barking dogs - safely and quietly.
Turn the DAZER II over and remove the 2 screws. Remove the cover and insert new replacement batter into the back of the Dazer II ultrasonic device. Please be aware, the replacement battery must be an alkaline battery (ie RAYOVAC or Duracell are recommended). Heavy duty, rechargeable or general purpose 9 volt batteries will not work. We supply a free 9 volt RAYOVAC battery with every new Dazer II barking device shipped to you. See also "How long does the battery last in the Dazer" FAQ.