What are they? The all-new fitness trackers from Fitbit that land just in time for Christmas. The Charge 2 updates Fitbit's original model with new colours and interchangeable straps, while the Flex 2 is so fashion conscious it doesn't even look like a fitness tracker at all. In fact, if you don't want to advertise your love of fitness on your arm, it's perfect.
What do they do? A lot of new stuff. For starters, if you're having a spaz out at work, the Charge 2 now comes with short guided breathing sessions to help you work through it, as well as more watch face options. And while the Flex 2 won't actually tell you the time, it's a more discrete option that Fitbit lets you use as "a band, bangle or pendant". Perfect for hiding under a shirt if you don't like watches.
![The Charge 2 comes with interchangeable straps, new watch faces and a new relaxation mode.](https://www.nzherald.co.nz/resizer/v2/UDTHKZMKH6P6CRY3JWCIUEZRLM.png?auth=0279e256eaf9c5af0e8eb6f3cda456bd5dfc2468f7ec982af8b23a8d19512bdd&width=16&height=14&quality=70&smart=true)
How do they work? Firstly, as fitness trackers. Both options will monitor your steps and track your sleep, with your stats sent seamlessly to your smartphone app. The Flex 2 won't measure your heart rate, but it comes with one very cool bonus - it's the first ever waterproof Fitbit. If you're a swimmer, that's a big plus. And thanks to its small removable interior, it's easy to change between those accessories - depending on which ones you own.