This article contains the WD100C Series Shark HydroVac™ XL Cordless Owner's Guide. This supports the WD100 and WD101 SKUs.
On the bottom of your box, you should see the model number near the bar code.
The main body of the vacuum (back of the unit) should have a rating label that features your model number.
Your product's model number is listed on the front cover of your instruction booklet.