A device for facilitating the stringing of a guitar is provided. The caller station is connected to a first edge network via a first telephony interface, and the callee station is connected to a second edge network via a second telephony interface. The ejecting device includes an ejecting mechanism and a lever mechanism. The alarm sensitivity may comprise a first tier, a second tier, and a third tier. The member extends forward of the front teeth and prevents the horse from applying force on the front teeth, when attempting to crib. The stacking device operates at the exit of a rotating machine operating at high speed, and having a rotating head for the single objects, and comprise an extractor means located in an exit station of the rotating machine intended to remove the objects from the rotating head one at a time.