World's most intelligent clean and renew system. Keep your shaver feeling like new everyday. Fresh alcohol-based cleaning fluid is pumped through the shaver head to quickly and hygienically clean away shaved stubble, debris and grease. The shaver automatically charged. For use with Clean and Renew system shavers (Series 7 790cc, Series 5 590cc and 570cc and Series 3 390cc; also previous models: Pulsonic 9595, 360° Complete 8995 and 8985 and Contour 5895). Approximately 6 months cleaning.