You might be right but I got the idea from this site.
WARNING: I recently got a call from a lady who used a 2000 Hz 15 volt "Ultimate Zapper" made by a company in Canada. She told me that the result of using the device was neurological damage that has not cleared up. I doubted that the zapper itself could cause damage and asked her about the details. She had used the unit 40 minutes a day from the first day. The result, she says, has been fairly serious problems that have lasted for a couple years. It appears that she had killed something like candida or Lyme spirochetes so fast that toxins had caused damage. These are research devices only. They are not approved for use on humans. If they are used, they should be used with caution, starting out with 1 minute per day and slowly increasing.