This is the Fitbit Alta HR which is my new favorite fitness tracker.
And according to Fitbit, it's also the world's slimmest fitness tracker with continuous heart rate.
But despite that sensor, the battery will still last seven days which is pretty damn impressive given it's small size.
The Alta HR is also the first Fitbit to get a new sleep feature.
Instead of simply tracking how long you slept, it will now measure when you're in light, deep, and REM sleep cycles.
But this feature will also be coming to the Charge 2 and Blaze later this month.
Now, aside from the heart rate sensor, this is essentially the same Alta Tracker we reviewed a year ago.
It has swappable bands and can track steps, distance, calories burned, active minutes, and sleep.
It will also display notifications for incoming calls, text messages, and calendar alerts.
But like I said with the original Alta, the screen is small, and these notifications can be hard to read.
And while the tracker can automatically detect various activities like running and biking, you can't manually start a workout like you can on the Charge 2, nor does it have guided breathing sessions.
But that's not a huge trade off.
Overall, I think this is the Fitbit tracker most people should get.
It's slim, has great battery life, and it's not a complete eyesore like the Charge 2 can be.
Plus it still has a heart rate sensor for more accurate tracking.
Really the only downside is that it's not swimproof like the Flex 2. The Alta HR is available now for $149 That's the same price as the Charge 2.
So really, unless you care about the stopwatch and workout modes, the Alta HR is the Fitbit to get.
For more information, check out my full review over at CNET.com