[07/08/2018] Optoma UHL55 高畫質投影機，支援4K超高解析度，支援語音助理，亮度1,500 ANSI lumens，Optoma UHL55 Compact True 4K HDR LED UHD Smart Projector, Works with Alexa and Google Assistant for Home Theaters and Outdoors, with Built-in Wireless Speaker，定價$1499，目前特價$999 USD。Prime境內免運費 (學生可以免費試用Prime)。哪裡買：amazon 。