Spiny Spencer is a 1-wheel E-Stim pinwheel. More than 20 spikes stimulate the nerves (from gentle to hard). Connection type: 2 mm plug (in a socket). An adhesive electrode or e.g. a Rodeo Robin penis sleeve (Art. 52 8994) should be connected to it, in order to complete the electric circuit, because it is a monopolar toy. An E-Stim device like e.g. Tension Lover (Art. 52 8927) or Pure Vibes (Art. 52 9761) is needed to activate the poles. Size: 18.5 cm long, 1 cm wide. Weight: 70 g. Material: surgical stainless steel.