Have your sub on your key ring for public control.
Owner testimonial
……. a brand new means to torture my subjects at the touch of a button - whether out to dinner, shopping or anywhere outside the dungeon I choose. I recently took slave karen for a promenade with the unit hooked up to a pussy plug - and the poor thing was so turned on she couldn't walk a straight line. Even more fun than I had hoped!
http://www.sextek.com/home.html