MetroCon

MetroCon is a 25-pin connector that used for charging and syncing data and files (USB 1.1 and 2.0) to older TheoryPhone devices prior to TheoryPhone X, Portosic Digital devices prior to sixth generation, first generation Portosic Touch, Portosic Digital, Portosic Mini, Portosic MC, TheoryPDA, and TheoryPDA Style. It was first released in 1996 and discontinued and replaced by faster 10-pin USB 2.0-based XCI charging and syncing connector that was introduced in 2006.