Philips Norelco #ad - Otherwise, replacement trigger will turn off automatically after 9 successive shaves. Easy to replace heads: 1 pull the shaving head holder off. 4 to reset the shaver, press and hold the on/off button for more than 5 seconds. Compatible with the following series: s9000 s9xxx, 8000 S8xxx, star wars Shaver SW97xx, Star Wars Shaver SW67xx Please see Description below for more information.