Oura smart rings are on sale for up to 30 percent off this Black Friday

Oura is hosting a Black Friday sale on many of its more popular smart rings. Perhaps the most notable deal is for the Oura Ring 4, which is down to $249. This is a discount of 29 percent, as it typically costs $349. The sale applies to the black colorway. <br /> The Ring 4 actually topped our list of the best smart rings, and with good reason. It's comfortable to wear for long periods of time, which is always nice. It's a visually striking ring. We also appreciated the size options, as it fits fingers from size 4 to 15. <br /> <br /> <br /> As for functionality, this smart ring tracks a number of health and fitness metrics. The affiliated app will send out notifications when it thinks you need a rest or to remind you to exercise. It keeps an eye on sleep [...]