It may still have useful tech like a pressure sensor and Bluetooth logging, but typicallyfewer connected features than Smart models. HX991B (DiamondClean 9000). HX992B / DiamondClean Smart. Older silver charging bases (e.g.HX9100 model ) will NOT work unless they are modelCBA1001 CBA2001 CBA3001 CBA4001 CBA5001 CBA6001 (link below) are compatible.
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