I tried several, the ones I tried were all good,Beck, Rife, Dr Clark, But I 
love the simple Dr Clark the best because it is so simple.  I used to work for 
Dr. Clark in the 2000-2003 area, I used he zappers a lot then so I could 
explain them to others.  They work.  Dr Clark died, but her work goes on.
 Tel Tofflemire
Dewey, AZ.




________________________________

 Kirsteen Wright wrote:

 I've been seriously considering buying a zapper and am toying between
 these two. I'd really welcome any comments. Is there any advantage to having
 the dual frequency? I can see the timer might be a good idea.