A wireless what?? light switch??
It's amazing what Technology can do for us now. I was inspecting a house and my client was very disappointed with the location of the switches. Seems like small thing, but when you have to walk up to the second story to turn on a light it was easy to understand. It used to be a messy job to add a light switch to a finished space. Now with wireless technology its has become easier then ever. Check out Lutron Maestro Wireless. It's now as simple as changing out the original switch with the Maestro Wireless and installing the new wireless switch with double sided tape (or screws if you want) to almost any location you want.