Activity Tracker
This is a wearable device that measures how much you walk or run. Fitbit and Nike+ are popular examples.
這是一個穿戴裝置，用來測量你走路或跑步的多少。Fitbit和Nike+就是兩種受歡迎的商品。
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This is a wearable device that measures how much you walk or run. Fitbit and Nike+ are popular examples.
這是一個穿戴裝置，用來測量你走路或跑步的多少。Fitbit和Nike+就是兩種受歡迎的商品。