References 465% CONFIDENCEOverall confidence: 65%How well the pin's source and references back up its dates.Weighted average of how firmly 4 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins from 50% to 74% confidence

The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.

• [1]50%
  electronics.sony.com/audio/headphones/headband/p/whch730n-w

  electronics.sony.com· Posted Sep 14, 2026· Starts Sep 30, 2026 ✓· 25% of score

  No source gives an exact on-sale day. Sony's own press release of September 7, 2026 (https://sony.mediaroom.com^[3]/2026-09-07-Sony-Electronics-Introduces-WH-1000XM4C-M4-2nd-Gen-Wireless-Noise-Cancelling-Headphones-and-Updates-Popular-Mid-and-Entry-Level-Wireless-Headphones-with-WH-CH730N-and-WH-CH530) states the WH-CH730N is available 'from September 2026', and Engadget's^[4] write-up of the same release says Sony 'will ship the WH-CH730N this month'. Dated to the last day of the stated month, September 30, 2026, as an estimate.

• [2]78%
  Sony has finally upgraded its budget five-star wireless headphones range

  whathifi.com· Added Sep 15, 2026· 25% of score

  What Hi-Fi's own headline, "Sony^[1] has finally upgraded its budget five-star wireless headphones range," backs the pin's claim about an updated Sony budget model from a respected audio review outlet, though the article body itself could not be retrieved to confirm the specific battery or ANC specs.

• [3]90%
  Sony Electronics Introduces WH-1000XM4C and Updates WH-CH730N and WH-CH530

  sony.mediaroom.com· Published Sep 7, 2026· 25% of score

  Sony's^[1] own press release, published 7 September 2026, one day before the pin's stored date, confirms the WH-CH730N update with "improved call quality, and longer battery life from its predecessor," though it cites "up to 50 hours" battery life rather than the 75 hours in the pin's description - a discrepancy worth noting.

• [4]85%
  Sony Revives Its WH-1000XM4 Headphones As A Refreshed $300 Option - Engadget

  engadget.com· Published Sep 7, 2026· 25% of score

  Engadget's launch report says the WH-CH730N "promises up to 10 percent less noise through a revised ANC system", adds 10-band and gaming EQs, background music mode and a new safe listening mode.

Suggest a correction

Something missing or wrong? Say it in your own words: a link that backs this pin up, a different start or end date and why, or a fact it lacks or gets wrong. The AI checks it against this pin's sources, searches for better ones, and adds any page that backs you up. The pin's own sources still count most. A picture that shows something else, or shows it badly, is looked at too, and moved down or replaced.