The ElectraStim Rocker Butt Plug range has been designed for truly hands-free use and Silicone Noir Rocker Butt Plug - Large is the biggest and most filling of the three. The unique curved Rocker bases feature embedded 2mm inputs that allow you to sit on, rock and grind against the e-stim butt plug during wear. Designed with a tapered shape to assist insertion and a ridged texture to enhance sensation during wear. Seamless bi-polar contacts in the shaft transmit sensation from an ElectraStim stimulator, making the anal pleasure zones tingle and the muscles pleasurably throb in time with the stimulation pattern.