Thank you for viewing. This is a brand new, unopened item. I won it in a campaign, but I'm selling it because I already have one. The earphone plug is 3.5mm. I am also selling this on other platforms, so please comment before purchasing. The TRN audio Seahorse Pro is a wired earphone that provides excellent sound quality. - Model Name: Seahorse Pro - Brand: TRN audio - Country of Manufacture: China - FCC Certification: FCC - CE Certification: CE