The invention relates to a method for examining the resistance of a connection between two bodies, whereby one of the bodies only has a small mass. According to this structure, the pivot is in contact with the intermediate member, and rubs the intermediate member to control the sliding of the pivot. The scanning device irradiates an original with light by means of a light source and scans reflected light from the original. Because the device includes an active transponder, instead of a transponder which relies on magnetic coupling for power, the device has a much greater range. Requests to initiate a communication session may be received by the wireless router from client devices over a wireless local area network.