Our Extra Spiny Spencer is a monopolar e-stim toy with small wheels that provide gentle to intense stimulation to all body parts. It impresses with over 100 spikes spread on 5 wheels made from steel, so it always hits the right spot. Whether you decide to use Spencer's wheels to provide gentle stimulation or simply let its electrical impulses bring you intense pleasure, is entirely up to you. As it is a monopolar toy you need another self-adhesive electrode or e.g. one of the Rodeo Robin penis-loops in order to create a proper circuit for the current to travel on.