Activity tracker wise the Loop does all of the standard things activity trackers do, you know track your activity! The Loop also tracks your sleep as well as the heart rate "activities". Just to clarify the heart rate feature is meant for running or other activities and not for wearing the heart rate monitor all day but you can bet your butt I am going to wear that heart rate monitor all day at least once!!! The Polar Loop is rated waterproof to swim with although I don't know how well it tracks swimming but again I will most definitely find out. Battery wise it uses a rechargeable Lithium battery that according to Polar will deliver 5 continuous days of usage before needing a recharge. On the positive side I can already vouch for how quickly it charges back up from 30%-70% in like 15 minutes when I got it out of the box.
The Loop's display is an LED one that allows you to scroll through to see your activity for the day, steps, calories burned, and time using the single button next to the screen. The screen is quit clear and easy to read out of direct sun light but gets much harder to read with direct sunlight. It doesn't glare or anything but the sun makes it exceptionally hard to see the red dots that make up the screen. Data wise the Polar Loop syncs with the Polar Flow web interface using an included USB cable (also how you charge the device) or with the Polar Flow mobile app through Bluetooth 4.0.
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I will give the Polar Loop a good ol' run through the Jarred Gitz testing regime and get back to you all in a little while with what some might call an overly detailed review. In the meantime visit www.polarloop.com or comment below if you have any exact questions and just can't quit make it till my review comes out.