
AquaSonic Duo
ASIN B07HFG93GK

Black Series
ASIN B072YVWBXH
AquaSonic Duo vs Black Series: Which Set Fits Your Household?
Duo is the documented two-handle set: AquaSonic lists a dual dock, two travel cases, and ten heads. Black Series is listed as one handle with one case and eight heads, plus a four-mode menu that includes Soft.
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