[11/18/2018] ECOVACS DEEBOT N79S 全自動吸地機，ECOVACS DEEBOT N79S Robot Vacuum Cleaner with Max Power Suction, Alexa Connectivity, App Controls, Self-Charging for Hard Surface Floors & Thin Carpets，目前特價$139.99 USD。Prime境內免運費 (學生可以免費試用Prime)。哪裡買：amazon。