您好，抱歉剛剛外出用餐，我們這一款DF-808是屬於有線的，波音特全系列擴音機皆是有線的，因為國內政府開放的無線頻率不多，若您和同事用了無線產品，萬一頻率相近，有可能會互相干擾喔。DF-818好處是多了一條背帶，若不想用腰掛帶可以改用背帶，甚至有客戶購買了DF-818然後自行到外面購買無線接收器套件，輸入DF-818來播音說話上課，也是可行的喔。

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