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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.
Happened as dated, per hexus.net: "…net/qadgrv Add to My Vault: SteelSeries[2] has launched "the world's first dual-surface RGB illuminated…"
SteelSeries's own press release states the QcK Prism launched 'from Chicago' on April 26, 2017 as 'the world's first dual-surface RGB illuminated mousepad,' exactly matching the pin's stored date.
PCWorld independently confirms the April 26, 2017 reveal of the QcK Prism, describing its 'dual-sided premium surfaces - the first of its kind,' corroborating the pin's stored date.
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.