Whether you are new to prostate stimulation or just looking for a good small, butt (pun intended) effective bi-polar plug, Sparkie might be just what you are looking for.  This one cums (again pun intended) with its own small AAA battery power supply.  However, you are not restricted to use only this power supply, as it is "hard-wired" to the plug from the bottom and has a 2.5mm audio jack for plugging into your own power box.  You may need a 3.5mm to 2.5mm adapter if using a PES, ErosTek, EStim Systems or Folsom power box.  If you want to connect it to a TENS unit we recommend the TENS sockets to 2.5mm audio adapter wire.

Made from polished stainless steel, the insertable length is 3-3/4", just right for hitting the prostate. The small hotter tip at the top that is 7/8" long will definitely put some "spark" in the upper anal regions. 

The remainder of the bottom second electrode is 2-3/4" long and is at the widest part, 1-1/4" in diameter.  This creates some nice smooth and pleasing sensations to the bottom anal canal.

The neck that Mr Sphincter will bite down on when current is flowing, is 1/2" in diameter.  The round base is 1-3/8" in diameter and almost 1/2" in thickness and will give the outer edges of the butt cheeks just outside the sphincter some good tingling too.  :)

Let us not forget the ladies!!  This plug makes a nice electrode for exciting the inner walls of the vagina and the tip for great G-Spot stimulation too.