Changes

User have to buy accessories in addition like travel bag, spare cables, charger adapter, sports band<ref>Quell, Accessories, Online shop webpage: https://store.quellrelief.com/collections/accessories</ref>. And also two electrodes, user has to buy regularly, and which are currently available in two kinds of packages: one package of two electrodes (company claims one month supply) for 29.95$, or three packages of two electrodes for 89.85$<ref>Quell, Electrodes, Online shop webpage: https://store.quellrelief.com/collections/electrodes</ref>.

[[File:Quell-components.jpg|thumbnail|A) A therapy pod, B) An electrode array, C) A Band, D) An example of usage on upper calf, place of effect<ref>Shai N. Gozani, Science Behind Quell™ Wearable Pain Relief Technology for Treatment of Chronic Pain: https://www.quellrelief.com/files/science-behind-quell.pdf</ref>]]