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The AvantSonic Z3 Bladder Scanner is a portable bladder scanner great for any doctor’s office. In fact, there is no calibration needed for the AvantSonic Z3 because of it’s stepping-motor probe. Factory New 3-Year Warranty on Unit and Parts -
The AvantSonic Z5 Bladder Scanner is a portable bladder scanner great for any doctor's office. In fact, there is no calibration needed for the AvantSonic Z5 because of it's stepping-motor probe. Factory New 3-Year Warranty on Unit and Parts