We reviewed this cap in our journal: https://de.aliexpress.com/item/1005002053546567.html?spm=a2g0o.productlist.main.41.173b16a3hPJdH2&algo_pvid=a3853f8b-dbe2-4823-af18-83c75b6f1b8e&algo_exp_id=a3853f8b-dbe2-4823-af18-83c75b6f1b8e-20&pdp_ext_f=%7B%22sku_id%22%3A%2212000031497503710%22%7D&pdp_npi=3%40dis%21CHF%21326.55%21326.55%21%21%21%21%21%4021021d7b16792289526015344d06d0%2112000031497503710%21sea%21CH%21777421489&curPageLogUid=JVxAOlKmbcMK Initial price was about 200 USD for 8 channels and about 300 USD for 16 channels. Now, the price has risen to 300 USD for 8 channels and 460 USD for 16 channels. Do reviews about EEG devices lead to an increase of the price of these …
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