The Track heads shaver is waterproof, so you can even take it in the shower. You can monitor the status of the battery because the product has a nifty LED display. Thanks to operation on an integrated battery, the Philips S9711/31 Series 9000 will give you the ability to shave wherever you wish. On a single charge, the Philips shaver will run for 60 min. This will definitely be enough for a thorough shave. This shaver was designed for wet shaving.