Hand amputation due to traumatic events or diseases causes relevant impairments on the capabilities of a person. The use of hand prostheses has the potential to radically improve the quality of life of hand amputees. Active hand prostheses are usually controlled by myoelectric signals collected by means of surface electrodes placed on the residual stump muscles. These signals are used to identify movement intention and control hand fingers. Vibrotactile stimuli have been proposed to provide the user with a feedback aimed at improving the usability of the prostheses. Usually, vibrator and bipolar electrodes are placed in close proximity for practical and constructive reasons.