You can find the model and/or serial number on the back of your Philips shaver. The model number starts with RQ12.
Frequently Asked Questions
Where is the model/serial number of my Philips shaver?
Note:
In the registration process you will have to select a model number which ends in, for example, /21 or /80. This addition is not printed on the shaver. However, there's a picture in the registration website where you can see if the model comes with a Jet Clean System or not, and choose your shaver.
The serial number:
Consists of 9 digits and starts with a 5.