The ElectraStim Rocker Butt Plug range has been designed for truly hands free use. 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. 5.1 inches insertable length, 6.2 inches circumference at the widest point, 2 inches diameter. From ElectraStim. Please note this item requires an Electrastim power stimulator, not included. Sold separately.