E-Stim Electro Speculum
An inexpensive bi-polar butt-toy is this speculum which E-Stim transformed into an electrical toy. The top part is isolated from the rest of the speculum and forms one pole. The rest of the speculum is the other.
Based on the medical examination tool, the Bi-Polar Speculum adds a more intense sensation to your electro stimulation experience. Both the top and bottom 'probes' are electrical contacts, unlike other inferior versions of this device where the whole speculum is connected. This allows the sensation to penetrate exactly where you want it.
Available at Mister B.