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.
HZ4000UKT Series
HZ3000UK Series
HZ400UK Series
HZ500UK Series
HV380UK Series
HV390UK Series
HV320UK Series