A mobile computing device comprising: a first housing part including a first display; a second housing part including a second display; and a hinge assembly configured to couple the first and second housing parts (14, 16) and permit rotation of the first and second displays (20, 22) from a face-to-face orientation to a back-to-back orientation, the hinge assembly comprising a harness, a first hinge body arranged in the first housing part, and a second hinge body arranged in the second housing part, wherein: the first hinge body includes a first friction band comprising a first gear formed around a first void, the first friction band being configured to receive a first shaft formed on the harness, and the second hinge body includes a second friction band comprising a second gear formed around a second void, the second friction band being configured to receive a second shaft formed on the harness, characterized in that: the harness further includes a third shaft and a fourth shaft; a first hinge guide stopper is arranged between the first hinge body and the third shaft of the harness; a second hinge guide stopper is arranged between the second hinge body and the fourth shaft of the harness; and the first and second hinge guide stoppers (46A, 46B) are configured to prevent the hinge assembly from contacting the first and second displays (20, 22). a first housing part including a first display; a second housing part including a second display; and a hinge assembly configured to couple the first and second housing parts (14, 16) and permit rotation of the first and second displays (20, 22) from a face-to-face orientation to a back-to-back orientation, the hinge assembly comprising a harness, a first hinge body arranged in the first housing part, and a second hinge body arranged in the second housing part, wherein: the first hinge body includes a first friction band comprising a first gear formed around a first void, the first friction band being configured to receive a first shaft formed on the harness, and the second hinge body includes a second friction band comprising a second gear formed around a second void, the second friction band being configured to receive a second shaft formed on the harness, characterized in that: the harness further includes a third shaft and a fourth shaft; a first hinge guide stopper is arranged between the first hinge body and the third shaft of the harness; a second hinge guide stopper is arranged between the second hinge body and the fourth shaft of the harness; and the first and second hinge guide stoppers (46A, 46B) are configured to prevent the hinge assembly from contacting the first and second displays (20, 22). the first hinge body includes a first friction band comprising a first gear formed around a first void, the first friction band being configured to receive a first shaft formed on the harness, and the second hinge body includes a second friction band comprising a second gear formed around a second void, the second friction band being configured to receive a second shaft formed on the harness, characterized in that: the harness further includes a third shaft and a fourth shaft; a first hinge guide stopper is arranged between the first hinge body and the third shaft of the harness; a second hinge guide stopper is arranged between the second hinge body and the fourth shaft of the harness; and the first and second hinge guide stoppers (46A, 46B) are configured to prevent the hinge assembly from contacting the first and second displays (20, 22). the harness further includes a third shaft and a fourth shaft; a first hinge guide stopper is arranged between the first hinge body and the third shaft of the harness; a second hinge guide stopper is arranged between the second hinge body and the fourth shaft of the harness; and the first and second hinge guide stoppers (46A, 46B) are configured to prevent the hinge assembly from contacting the first and second displays (20, 22).