I LOVE my Rife machine - it works great....
It is the type that uses handgrips or footplates and I heard of recommendations from other users, so that persuaded me.
The model is : DF1 Digital Rife
It was very reasonably priced because it is a manual device and not programmable. The programmables are just way too expensive...and I checked the specifications, and this one is more powerful than most others - whether programmable or not. It does wonders for my wife's chronic sinus infections. You just use a supplied frequency list and you have to key in each frequency as you use them..................LOVE IT.