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 and permit rotation of the first and second displays 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 are configured to prevent the hinge assembly from contacting the first and second displays . 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 and permit rotation of the first and second displays 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 are configured to prevent the hinge assembly from contacting the first and second displays . 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 are configured to prevent the hinge assembly from contacting the first and second displays . 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 are configured to prevent the hinge assembly from contacting the first and second displays . <EOS>