Motorola BARK500U User Manual page 14

My dog keeps barking (does not seem to respond to the ultrasonic
correction).
• If you are certain that your dog hears the ultrasonic sound, however is still not
responding, try the next level higher (see "Select Correction Level" page 9).
• Replace the battery.
• If your dog still does not respond, contact Customer Service at
1-888-331-3383.
14 Frequently Asked Questions