Hi Hana, my SCS is By Nevro. Nevro Senza HF SCS is widely used in Europe and Australia but still in trials in the US. It runs at a much higher frequency than some of the other brands and because of the higher frequency you don't get the buzzing sensation. I think I read that the Boston scientific precision spectra plus also runs at the higher frequency now as well.
Please Check with your practitioner as I was told yesterday that the higher frequency without the buzzing has had better results in patients with CRPS. Seemingly the buzzing can in some cause the CRPS to spread. I don't have CRPS and can't comment, but I can tell you, I have my unit running 24/7 and I don't get any feeling whatsoever to indicate it's running. When I turn it on and off, I only know it's off because the unit tells me it is off.
Be well, be safe, be pain free, my new mantra for us all here on NT.