According to the homepage, you can read about your question under 'Guide': Waterproof electric shavers: Whether you prefer wet or dry shaving, the ability to shave in or out of the shower is a useful innovation. From the Series 1 to the Braun Series 9 Pro, our foil shavers are 100% waterproof. This makes cleaning your shaver easy and allows you to shave with or without foam or gel. If you find that shaving in the shower is the right method for you, the Braun Series 3 with its IPX7 certification ensures that you no longer have to worry. This means you could submerge your electric shaver 5 metres underwater, although we doubt you'll need to test that. The Braun Series 9 Pro (+) is also waterproof up to 5 metres, so you can submerge it without worry.
My opinion on this: I think shaving in front of the mirror gives a much better shave than in the shower! 😉
