1. Check the bottom of the box, you should see the model number near the bar code.
2. Check the back or bottom of the main unit, it should have a rating label that shows your model number.
3. Check your manual. Your product’s model number is listed on the front cover of your instruction booklet.
UA1450 Series
HP150 Series
HP300 Series
HC500/450 Series
HP232 Series
HP200 Series
HP100 Series
HE400 Series
HE600 Series