To reset the shaver, press and hold the on/off button for more than 5 seconds. Easy to replace heads. Old part number was SH98. Fits S9000 (S9xxx). Fits S9000 Prestige (SP98xx). Precision blades. s9711, s9211, s9211/26, s9211/12, sw6700, sw9700, sw6700/14, sw9700/67.
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