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Sony LinkBuds S (Black)

Model: WFLS900N/B · US configuration

Two black Sony LinkBuds S WFLS900N/B earbuds with silicone tips, shown from the side against a white background.
Manufacturer product image · Sony

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An earlier U.S. Black LinkBuds S configuration (retailer model WFLS900N/B; support family WF-LS900N) assessed for a sealed in-ear design with documented active noise cancellation. This is a model assessment, not a live offer or a statement about a seller’s box or battery.

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Assessment scenario: Earlier sealed in-ear ANC configurations

An editorial assessment scenario for comparing earlier sealed in-ear earbuds with documented active noise cancellation. It is not a statement of the visitor's intent, present stock, used condition, warranty or seller quality.

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Why consider this model?

  • Sony calls the design closed and its model-specific guide describes placing the tip into the ear canal and twisting the earbud into position; the exact fit and seal remain personal.
  • Sony lists noise cancellation and an ambient-sound mode. Those feature statements are not independent measurements of cancellation performance.
  • Sony’s YY2950 Help Guide documents distinct Classic Audio and LE Audio operating arrangements, so the selected host and setup should be checked before purchase.

Tradeoffs to weigh

  • The U.S. retailer listing for this exact Black configuration was marked no longer available new when checked. No present stock, price, seller quality, used-unit condition or battery health is represented.
  • Sony lists ANC-on music maxima of six hours for SBC or AAC, 3.5 hours for LDAC and 5.5 hours for LC3; each figure belongs to a different documented mode and use/settings can reduce time.
  • The two-device multipoint mode is separate from LE Audio; Sony marks multipoint unavailable during an LE Audio connection and does not publish a multipoint-specific runtime.
  • IPX4 applies to the earbuds only; the case is not water resistant. Sony documents USB-C case charging, while wireless charging for this exact case remains unverified.
  • The package guide lists SS/S/M/LL tips, not L. No personal fit, ANC, call, sound or runtime test was performed.
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