Where is the model/serial number of my Philips shaver?
You can I find the model and/or serial number on the backside of your Philips shaver. The model number starts with RQ12.
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.