FeaturesHalogen HPX® lamp illumination for true tissue color (optional Sure Color™ LED lamp available)18 unique aperture/filter combinations for greater versatilityPolarizing filter virtually eliminates corneal reflection68 lenses in single-diopter steps for precise resolution (+38 to -30)Compatible with all existing Welch Allyn 3.5 V power sourcesLook for the traditional "flat-top" design you've come to trust
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