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Multiple expression modes: Many automatic double breast pumps have multiple expression modes, which can help to mimic the natural nursing rhythm of a baby and improve milk flow."

Rechargeable battery: A rechargeable battery is a convenient feature that allows the user to pump without being tethered to an outlet.

"Quiet operation: Many automatic double breast pumps operate quietly, which can help to avoid disturbing others in the room or causing discomfort to the user.