The Swedish-built Trilobite vacuum cleaner, similar in functionality, uses ultrasonic waves to control direction. It also boasts 90 watts of suction, three times that of Roomba, but the selling price is high at about NT $ 70,000 apiece.
功能相似的瑞典「三葉蟲」吸塵器，採用超音波聲納來控制方向，吸力強大，90 瓦功率，是倫巴的 3 倍，但售價高，一台約 7 萬元。