I have am the proud owner of a new electroplay unit -- ErosTek 302R (good job slave m!). It has dual channels so the electrodes can be placed on two different locations. What really made me choose this particular model is that it operates via remote control. The source box is small enough to be hidden on the submissive's body. Then all I have to do is press the buttons on the keychain remote and voila! I also indulged in several attachments for diversity of play including elastic bands for wrapping around the cock and balls, as well as a glove and sticky pads. If you are interested in exploring this type of play, do let me know in advance so I can bring the ER 302R to The Gates for our session. Important note: never use TENS unit or other electrical devices (other than the violet wand) above the waist. I'd had people want to put the electrodes on their nipples and in general, this is not a good idea. Just follow the rules, and the sensations can be amazing. . .