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About this item

• GPS Cellular model lets you call, text, and get directions without your phone
• Measure your blood oxygen with an all-new sensor and app
• Check your heart rhythm with the ECG app
• The Always-On Retina display is 2.5x brighter outdoors when your wrist is down
• S6 SiP is up to 20% faster than Series 5
• 5GHz Wi-Fi and U1 Ultra Wideband chip
• Track your daily activity on Apple Watch and see your trends in the Fitness app on iPhone