This is a common suction mount for a car, typically located on the windshield. The smaller end of the mount features a MagSafe magnet meant for your phone, which has a reciprocal metal ring that might be hidden. It tends to lose its vacuum suction over time.
這是一款常見的車用吸盤支架，通常安裝在擋風玻璃上。支架較小的一端配備了 MagSafe 磁吸裝置，專門用來固定你的手機——你的手機背面或保護殼內側可能隱藏著一個對應的金屬環。不過要注意，這種吸盤用久了容易失去真空吸附力。
當你在炎熱夏日停車時，高溫會讓吸盤橡膠軟化；而寒冬時低溫又會讓橡膠變硬，這些都會加速吸盤老化。有時開車經過顛簸路段，你會突然聽到”啪”的一聲，那就是吸盤失去吸附力的聲音…
If your phone does not have the metal ring, you can purchase a separate one that adheres to the back of your phone or its case.
如果你的手機沒有內置金屬環，也可以單獨購買一個帶背膠的金屬環，直接貼在手機背面或保護殼上。
建議選擇奈米級背膠的金屬環，這種材質既牢固又不會在拆下時殘留膠痕。知名品牌的金屬環通常會做成僅0.3mm的超薄設計，完全不會影響無線充電功能。
With the metal ring attached, you can also use a magnetic holder like this to secure your phone. However, this must be removed if you wish to mount it to the flat magnetic surface of the car holder, as the centre is thicker than the sides. There are others that are rather flat, though.
裝上金屬環後，你就能使用這種磁吸支架來固定手機。但要注意：如果想把手機吸附在車載支架的平面磁吸座上，就必須先拆下這個金屬環，因為它的中心部位比邊緣厚很多。當然市面上也有比較平整的款式可供選擇。
技術細節補充：高品質的磁吸支架會採用釹磁鐵，這種稀土磁體的吸力是普通磁鐵的10倍。有些產品還會在接觸面設計蜂窩紋路來增加摩擦力，即使遇到急煞車也不易滑脫。
This device features a sensor and an electric motor that automatically engage to pull the suction pad back into position, reestablishing the vacuum. It is battery-powered and can last up to 3 months on a single full charge. It has a quick-release button to release the vacuum and also a power switch.
這款智能支架內置傳感器和微型電機，能自動收縮吸盤來重新建立真空狀態。它採用充電電池供電，充滿一次可用長達3個月。支架配有一鍵釋放按鈕和電源開關，操作非常便捷。
當傳感器檢測到吸力減弱時，電機會發出輕微的”嗡嗡”聲進行自動調節。夜間開車時，支架邊緣的LED指示燈會亮起藍光，提醒你設備運作狀態。
And with the ring-shaped magnetic car mount, you won’t need to remove the magnetic holder from the back of your phone when attaching it. But the magnetic force won’t be as strong.
至於環形磁吸車載支架，它的優點是使用時無需拆下手機背面的磁吸環。不過磁力會相對弱一些。
To overcome this, you can always stick another metal ring to the back of the holder.
有個小技巧 —— 你可以在支架背面再加貼一個金屬環。就像三明治一樣，雙層金屬結構能讓磁力增強 40% 左右。但要注意兩個金屬環必須精準對齊，否則反而會降低吸附效果。）
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