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Fitbit Charge 4 updated with features like skin temperature, SpO2 tracker, and more-Tech News , Firstpost
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Amazon.com: Fitbit Sense Health & Fitness Smartwatch W/GPS, Bluetooth Call/Text, Heart Rate SpO2, ECG, Skin Temperature & Stress Sensing (S & L Bands, 90 Day Premium Included) International Version (White/Gold) : Electronics
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