Because hypnosis is a consensual activity it needs no special device or method.
It does require focus of some kind but not always with the eyes. It could be any of your senses or your emotions or a memory or your imagination.
I dont know anyone who uses a pendulum, its just for the movies and old movies at that.
If you are in the London area and are interested in some hypnotherapy, give me a buzz, drop me a line, get on the blower and nip over to Harley St. You might even enjoy the experience.
Here’s a link to my Hypnotherapy in London website