The black and silver versions of the smart ring are on sale for $297, while the brushed silver and dark gray colors are on sale for $339, and the gold version is on sale for $424.

In honor of Prime Day, Amazon is going against the norm with the first-ever price cut on Oura Ring 4: With a 15% reduction on all sizes, you can now buy the Oura Ring 4 in silver, size 10, for $297 from $349. Other sizes are also on sale, but some of them are already sold out.

This is the first time the Oura Ring 4 has been discounted - Thanks to Amazon Prime Day, fitness enthusiasts looking to try the high-tech health tracking jewellery can enjoy slashed prices