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Those are some significant improvements compared to its predecessor, the 2023 Ring Air, which provides 4-6 days of battery life and several days of offline data storage, according to user estimates. Ultrahuman has also made other upgrades to the Ring Pro, including a redesigned heart-rate sensor that improves signal …
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但无论是 OLED 像素发光还是 LCD 背光板发光，它们发出的都是（近似）全向的光线——你能看到，你旁边的人也能看到：