The waterproof and SpO2-packing Fitbit Charge 3 will be available 7 October
Fitbit may be moving into the world of smartwatches with the Versa and Ionic, but the new Charge 3 - the newest in its best selling brand of devices - shows that it still cares about fitness trackers. And you'll finally get it on your wrist on 7 October, when it ships globally. The new…