I've never used that particular device, but generally you soak the sponges in a saline solution, place the electrodes on the desired locations, and choose your

I've never used that particular device, but generally you soak the sponges in a saline solution, place the electrodes on the desired locations, and choose your desired voltage. Anything under 4ma is considered safe, though I personally never go past 2ma. I use the improved attention montage: https://totaltdcs.com/electrode-placement-montage-list/improved-attention/ https://totaltdcs.com/electrode-placement-montage-list/impro...