A mobile device case, comprising: a reel assembly, comprising: a reel for storing a cord of user-provided headphone; a supporting plate coupled to the reel; a hub coupled between the reel and the supporting plate, comprising: a first cavity between a first side of the hub and the supporting plate, and a second cavity between a second side of the hub and the reel; a spring residing within the first cavity of the hub, wherein the spring is wound around a center of the hub in a first direction; a flat flexible cable residing within the second cavity of the hub, wherein the FFC is wound around the center of the hub in a second direction opposite to the first direction, the FFC comprising a first end for electrically coupling to a female jack connector of a device; and a female connector electrically coupled to a second end of the FFC for engaging a male jack connector of the user-provided headphones, wherein when the reel rotates in the first direction, the winding of the spring tightens and the winding of the FFC loosens, wherein when the reel rotates in the second direction, the winding of the spring loosens and the winding of the FFC tightens. a reel assembly, comprising: a reel for storing a cord of user-provided headphone; a supporting plate coupled to the reel; a hub coupled between the reel and the supporting plate, comprising: a first cavity between a first side of the hub and the supporting plate, and a second cavity between a second side of the hub and the reel; a spring residing within the first cavity of the hub, wherein the spring is wound around a center of the hub in a first direction; a flat flexible cable residing within the second cavity of the hub, wherein the FFC is wound around the center of the hub in a second direction opposite to the first direction, the FFC comprising a first end for electrically coupling to a female jack connector of a device; and a female connector electrically coupled to a second end of the FFC for engaging a male jack connector of the user-provided headphones, wherein when the reel rotates in the first direction, the winding of the spring tightens and the winding of the FFC loosens, wherein when the reel rotates in the second direction, the winding of the spring loosens and the winding of the FFC tightens. a reel for storing a cord of user-provided headphone; a supporting plate coupled to the reel; a hub coupled between the reel and the supporting plate, comprising: a first cavity between a first side of the hub and the supporting plate, and a second cavity between a second side of the hub and the reel; a spring residing within the first cavity of the hub, wherein the spring is wound around a center of the hub in a first direction; a flat flexible cable residing within the second cavity of the hub, wherein the FFC is wound around the center of the hub in a second direction opposite to the first direction, the FFC comprising a first end for electrically coupling to a female jack connector of a device; and a female connector electrically coupled to a second end of the FFC for engaging a male jack connector of the user-provided headphones, wherein when the reel rotates in the first direction, the winding of the spring tightens and the winding of the FFC loosens, wherein when the reel rotates in the second direction, the winding of the spring loosens and the winding of the FFC tightens.