1. Check the bottom of your box, you should see the model number near the bar code.
2. Check the main body of the vacuum (back of the unit) it should have a rating label that features your model number.
3. Check your manual. Your product's model number is listed on the front cover of your instruction booklet.
This article contains the Quick Start Guide for the HV391 SharkFLEX® DuoClean® Vacuum.
