Philips HX9911 HX992B 9400 DiamondClean Smart Electric Toothbrush Black Handly
Older silver charging bases (e.g.HX9100 model ) will NOT work unless they are modelCBA1001 CBA2001 CBA3001 CBA4001 CBA5001 CBA6001 (link below) are compatible. Check photos to confirm your base. Use an adapter if charging outside the bathroom.