I have a darlex sleep sack that allows full access to the sensitive areas of my body through zippered openings while still being fully & completely bound. Absolutely love it when a Domme decides to use it as a base for just bondage or whiel other other toys & implements.

I also love different forms of electrical play & one of my favorite gadgets, beyond a really good tens console, is actually electically conductive rope (usually in conjunction with a violet wand).

Finally, there are remote devices (ex: Hush butt plug from Lovense) that allow a Domme to mess with me while out in public or from another part of the world.