https://de.aliexpress.com/item/4000829006993.html?spm=a2g0o.cart.0.0.2ebf3c008D1Ds9&mp=1 EEG cap operation guide & cap positioning: Tenocom EEG cap Operation Guide 2021 & 72h continuous wearing test: https://www.aliexpress.com/item/1005002981334566.html?pdp_ext_f=%7B%22sku_id%22:%2212000023054072835%22,%22ship_from%22:%22CN%22%7D&gps-id=pcStoreJustForYou&scm=1007.23125.137358.0&scm_id=1007.23125.137358.0&scm-url=1007.23125.137358.0&pvid=655ba087-21e7-4b51-bb8f-cbaae83ba637&spm=a2g0o.store_pc_home.smartJustForYou_892589637.5 Tenocom Medicals youtube channel: https://www.youtube.com/channel/UCP-73B7o-7Oa3eLCEDNNtQw/videos TENOCOM Official Store: https://www.aliexpress.com/store/5626179 TENOCOM has EEG caps in different sizes which have different colors: https://m.tenocom.com/tiaozhuan.html