I've looked at similar devices which had promising smaller trials but failed to show effectiveness in larger trials / systematic reviews. Will keep my eye out, but would probably wait for better research.
> Several of the authors have competing interests. BC, CH, EM, SLL, COC, SH, HHL are employees, consultants and/or shareholders of Neuromod Devices. BL, SV, DAH serve on the clinical advisory board of Neuromod Devices and receive monetary compensation for their contribution.
https://pubmed.ncbi.nlm.nih.gov/35773272/
> Several of the authors have competing interests. BC, CH, EM, SLL, COC, SH, HHL are employees, consultants and/or shareholders of Neuromod Devices. BL, SV, DAH serve on the clinical advisory board of Neuromod Devices and receive monetary compensation for their contribution.