This is both a battery operated version (first set included 2 AA) and a mouth suction version.I'm not sure where the filters go. I think the mouth tube .Seems simple enough . Two sizes of tips.Noisy and that may disturb some childrenNeeds a perfect seal to work.This would make a great gift for a mom "first baby care bag". Nobody thinks about the day to day care of a newborn, preferring to purchase quickly outgrown cute clothing and blankets.When I was a young mom, once the glammer of the party was over . I found myself hunting down stores to return half of the outfits (no way my baby could wear so many, and they were the wrong season!) But among the gifts was a small diaper bag with odds and ends like "nasal sucker" and "clippers" and other small price items. And those were the items that I actually used again and again, not only with my first baby, but with the second one as well.Great idea!
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