Connector systems may include a connector receptacle and connector plug or insert. The connector receptacle may include a tongue. The tongue may be formed using a printed circuit board. Contacts may be plated on top and bottom surfaces of the tongue. Retention features may also be located on top and bottom surfaces of tongue. These retention features may be speed bumps or other features. The connector insert may include a leading edge portion formed of plastic, a conductive shield around the insert behind the leasing edge portion, a plurality of spring contacts attached to an inside of the conductive shield, a top row of contacts; and a bottom row of contacts. Other connector receptacles may include a tongue having side ground contacts. The side ground contacts may engage an inside of a plug shield and have contacting portion to fit in openings in the plug shield.