Sony released Wireless Kirito (black) and Auna (red) themed headphones which sold out quicker than expected which were to celebrate Sword Art Online The Movie: Ordinal Scale. The promotion was to sell a limited amount of headphones from February 22nd to April 28th however due to great demand there were no more headphones to be sold by April 14th. There’s a possibility of a restock but there’s nothing promised.
On the not surprisingly end, there’s apparently still stock for the Sword Art Online Walkmans. In 2017 do you find yourself needing a new Walkman?