Apple Watch Series 6 (Certified Pre-Owned) lets you measure your blood oxygen level with a revolutionary new sensor and app.1 Take an ECG from your wrist.2 See your fitness metrics on the enhanced Always-On Retina display, now 2.5x brighter outdoors when your wrist is down. Set a bedtime routine and track your sleep. And with cellular service, you can go without your phone. It's the ultimate device for a healthier, more active, more connected life.

For this review, I tested a 40mm GPS and cellular Series 6 with a blue aluminum case and a deep navy Sport Loop. Apple also sent a matching Atlantic Blue Braided Solo Loop band in size 4, which fits perfectly on my wrist. Between the $499 watch and the extra $99 band, the total cost of the watch pictured below is $598. The new Braided Solo Loop looks chic, yet understated and casual. It feels secure and is easy to get on and off, but its $99 price ... A smarter choice than ever

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#Apple Watch Series 6 A longstanding cult favorite, the Apple Watch Series 6 gets a feature refresh with the introduction of the new series. Amp up the fitness tracking, software performance, and app selection for a wearable as timeless and classic as this one. ##Brighter Display. The Always-On retina display of the series 6 is 2.5 times brighter than the previous generation. This new technology makes it easier to read the watch face outdoors, even in bright sunlight. ##Performance Perks with the S6. The new dual-core S6 System-in-Package (SiP) makes this series 20% faster than previous mo