Yep, that is what she meant. I have had great luck using a single frequency, battery operated Zapper. (The Zapperplans.com Zapper). Just keep a good battery, and make sure that you do the full 3 times with the 20 minutes in between as Dr. Clark instructs. The multiple frequencies listed are for a different device, similar to the portable Zapper, but it ran on AC current. Also, Dr. Clark says some things about mature parasites laying eggs when they die, so you should plan on Zapping daily for 1-2 weeks, 1-3 times per day. Drink lots of water and expect to feel a little bit sick the first couple of days as you will be detoxing.